BLOODY BRANDY VEGAS CHALLENGE:

Hogwarts starts at 13 instead of 11 (making Harry 18 at the beginning of the story.) Starts August 4th, 2013, Tonks is only 4 years older than Harry (she was a 7th year when he was a 4th) making her 22. This is set in the Arrowverse (before crisis, so Earth-38) Kara is 20 also, before she became a hero. Harry was born on July 31st, 1995. Tonks was born in 1991 and Kara arrived on earth in 2006. (it's been 7 years) This story features a good Dumbledore and an ok Snape (he's still an ass though). I plan to release this story in batches of 20 which is each 1 parts of the story. There will be 4 parts. Part 1 is Voldemort, Part 2 is Supergirl Season 1-3, Part 3 is Supergirl season 4-5, and Part 4 is Crisis and Supergirl season 6.

Chapter 1:

Waking up in utter agony was not a start to a fun day in Harry James Potters opinion. What made it worse was not remembering had happened the night before.

He opened his eyes only to wince in pain, merlin he must have drank enough whiskey to kill most normal men, luckily the phoenix tears and basilisk venom in his veins prevented him from getting drunk, or it should have if he hadn't drank enough to kill a group of people.

Before opening his eyes again, he tried to remember what had happened, all he could remember was gambling and drinking the night away with Tonks. A condition in Sirius will, was for him to go to Vegas for a 2-week vacation. Tonks had volunteered to take him since Remus was unavailable.

Of course, Harry had to mess it up, he had to drink so much that he didn't remember what happened, that was just like him. The inability to get drunk and then somehow, he managed to get drunk, he was always doing things that should have been impossible.

He took in the room, it was dark. Sunrise had yet to creep into Vegas, it must still be early. Everything was blurry, he needed to get his glasses.

Reaching over towards his right, where he hoped the nightstand was, he realized something very alarming to a recent 18-year-old boy, he wasn't alone in bed. Needless to say, he panicked he moved to his left to get off the bed, only to realize there was someone to his left as well.

He was broken out of his panic by a voice that sounded familiar.

"Stop moving trying to sleep." The voice on his left mumbled.

"Trying to sleep? What the Bloody Hell is going on! Where are my glasses?"

The figure reached her hand to the nightstand, she found what she was looking for and quickly shoved what Harry now knew were his glasses into his hand. He put it on and looked at the figure to his left who looked at him wide-eyed and with a slight panic in her features, which was evident when her hair shifted color, what color Harry didn't know since it was too dark to tell.

"Tonks?" He mumbled.

Before she could utter a reply, the figure on his right spoke up, "You two be quiet, I'm trying to sleep."

Harry now annoyed at being told to be quiet snapped at the figure, "I can't be quiet, what happened? Who are you?"

The figure grabbed the pillow from behind her head and put it over her face and screamed in annoyance. She then withdrew her face from the pillow and moved to turn on the light on her nightstand.

Harry winced at the inclusion of light now assaulting his eyes. Judging from the groan coming from Tonks, he assumed she hated as much as he did. When his eyes focused, he looked to the figure on his right and was stunned at what had to be one of the most beautiful women he had ever seen.

She looked to be in her early twenties at the most, she had long blonde hair and the most beautiful blue eyes he had ever encountered, a scar was etched above one of her eyebrows, but they didn't detract from her beauty in the slightest.

Harry blushed brightly when his eyes trailed further down her figure, and he realized she was naked. He then looked at himself and realized he was naked, looking to his left he realized Tonks was in a similar boat. He averted his eyes and looked at the ceiling causing both ladies to let out a wonderous laugh.

"Oh, come on Potter, you've seen me naked plenty." Tonks teased her fellow metamorph.

Turning to his sometimes lover, "Not helping Dora."

Tonks rolled her eyes, "So, who are you blondie."

"It's Kara not blondie." The woman known as Kara replied her faced etched in annoyance.

"Kara, I don't mean to be rude, but do you know what's going on." Harry asked.

Kara seemed to try to remember what happened when her face turned turbulent and she suddenly glanced at her hand, a hand Harry now observed held a ring on her ring finger.

Harry's eyes went wide at that, he glanced at Tonks who also looked at her own left hand and noticed a similar ring on her ring finger. Harry looked at his hand and noticed another ring on his hand, unlike his lordship rings though this one was a plain platinum band on his left ring finger.

"D-did w-w-we?" He stuttered out.

"Get married? Yes, we did." Kara managed to get out.

"But how?" he mumbled.

"Well, that's easy lover, you asked we went to a church I assume and performed the deed that sealed our lives. I mean honestly Harry I would have gladly married you in a couple years but now?" Tonks said glaring at the man she loved. A fact she hadn't ever told him due to all the drama of their lives.

Harry rubbed his temples with both hands, "I get that Dora, but how am I married to two women."

Kara crossed her arms showing off her incredible figure, which caused Harry and even Tonks to stare. Kara remembered her current appearance and let out a squeak and covered herself up, "I'd like to know that also." She asked trying to ignore the blush now adorned on her face.

Tonks let out a sigh of annoyance, "Harry you're the head of two old houses, you can take a wife for each."

"Oh, I am. I didn't know that meant I could marry two people."

"It's not actually done all that much, mostly because being head of two households is incredibly rare. Most houses merge into other houses, like the Peverell's did with the Potters 700 years ago." Tonks said.

"Houses? What are you two talking about." Kara said glaring at the two of them like they were talking gibberish.

Harry looked at Tonks, the two seemed to have a silent conversation with each other. Tonks clearly one as Harry groaned and turned towards Kara to give the long explanation that magic was real.

10 minutes later Kara looked at her two new companions and asked, "So, magic is real? Ok, I can see that, on Krypton there was the warlock guild that dealt with arcane knowledge. I don't know much about that considering I didn't have the gift."

"Krypton? Like Superman?" Tonks and Harry each blurted out.

Now Kara looked nervous, "I guess it's my turn for explanations now."

What followed was her history as one of the sole surviving members of Krypton.

The three of them sat there in naked silence, until Harry broke it, "So, annulment?"

Kara nodded her head, "Yes, no offense you seem nice, but I didn't picture being married at 20."

"None taken, I don't particularly want to be married at 18 anyway."

Tonks bounded up looking for the marriage licenses, when she found it, she started reading it and went pale, which caused her companions to turn pale at what they figured was bad news.

"So, Har I got some good news and bad news."

Sighing deeply Harry looked at his lover, "Just lay it on me. Bad first so I have something to like at the end, hopefully." He finished with a mutter.

Kara just looked at Tonks in a way that said get on with it.

"Soooo, we apparently are all married to each other through a Black family contract."

"Tonks, I don't speak pureblood bullshit and neither does Kara, just explain what this means."

Glaring at her husband, "It means that our marriages are iron clad, there is no getting out of it after our consummation."

"Consummation? Oh, merlin. I know we've slept together before, but did we sleep together." He looked at Kara whose face was bright red as she merely nodded at him.

"As this is a magical contract it means we three are bound for life, so no other lovers." Tonks finished softly.

Tonks honestly didn't mind the fact that she and Harry were bound together. If not for him still being technically in school, they would be together already. They had started dating in his fourth year. During his disastrous four year they had connected, and she had been his lone pillar of support. Discovering his metamorph gift just deepened the already existing connection that they had.

With Voldemort's return they decided to take a step back from each other, although that was more for public purposes anyway, considering they still saw and slept with each other during Christmas and Easter. If she was being honest with herself, she would admit that she loved her emerald eyed husband and she knew he loved her also considering he would mumble it in his sleep.

The only problem she had with this union was the addition of the Kryptonian, not that she didn't find her attractive. She just didn't want her to become caught up in the war that was soon to reach their doorstep, a Kryptonian would be useful though.

She looked at her husband and noticed something for the first time this morning, his scar looked faded, not to mention there looked like a black residue on it.

"Harry what happened to your scar?"

His scar, what was she talking about. Before he could say anything, Kara gasped remembering the night before.

"When we consummated," Kara turned bright red at the word before she continued, "our marriage, your scar split open and there was this scream with a bright light. You then rolled off me and we passed out."

Tonks let out a snicker, "Talk about mind blowing sex, do you feel any different Har?"

Harry closed his eyes and started to utilize the occlumency Tonks had taught him, he went to his core and noticed the connection he had with Voldemort was gone. The black tendrils that had surrounded his core were gone.

Laughing he bounded up not caring for his state of dress as he grabbed a now squealing Tonks into the air in a hug.

"It's gone! His connection is gone!" He set her down and started to snog his wife.

They were broken out of their impromptu snog as their wife cleared her throat to get their attention. Harry turned towards her causing her to look away with a bright red blush on her face.

Harry went red himself as he covered his privates.

"I don't think there's any point to cover up lover, we've seen it all." Tonks teased running her hand down his back.

He let out a meep and looked for his suitcase, spotting it by the door he grabbed it, with a quick telling them he was getting showered and then dressed he made his way to the bathroom.

His heart was pounding. Not only was he married to the woman he loved, but he was also married to a blonde alien bombshell. This caused a reaction from his lower half which prompted him to take a cold shower.

5 minutes later he was stepping out of the shower he heard Tonks call out, "Hurry up hubby, we need to shower also."

"Just a minute Dora." He quickly dried off and put on a plain black t-shirt and blue jeans. He adjusted his hair to a short morph and tried to hide his scar, he was pleasantly surprised when it disappeared, something he had never been able to morph away. His connection with Riddle must have been what kept it intact.

He exited the bathroom to see a sheet wrapped Kara waiting for her turn, she had her clothes in her hand as she moved past him with a slight smile in thanks.

He went to sit on the bed next to a naked Tonks. She was unembarrassed to be naked in front of him, not that she ever was. He had long since been comfortable fully with her. Well, that wasn't completely accurate, this morning was plenty uncomfortable.

"Tell me what you're thinking Dora." He said wrapping his arm around her as she then leaned into him.

"Is it wrong to admit I'm kind of happy right now?" The now vulnerable woman asked.

"If it's wrong then I am wrong too." He said which prompted her to look up at him with love in her eyes.

He leaned his head down and kissed her, she melted in his embrace and continued kissing her husband.

They finally separated after a couple of minutes, "I love you Dora, I have for a while now."

She cupped his cheek with one hand and rested her forehead on his, "I love you too." She whispered back at him.

He kissed her tenderly as he poured his emotions into it. Merlin how he loved this woman, who now happened to be his wife.

Separating for the second time he asked, "What was the good news?"

"We should probably wait for blondie." She said.

"I HEARD THAT." Kara yelled out, causing both of them to laugh.

A couple minutes later Kara exited the bathroom avoiding her spouse's gazes.

Tonks bounded past Kara giving her a wink as she passed.

Kara and Harry sat in silence before he asked, "So, what do you like to do?"

She looked at him in suspicion, "Why?"

He raised his arms in surrender, "Because Kara like it or not we three are stuck together, I already love Dora-" It's Tonks, Dora shouted causing her husband to roll his eyes, "As I was saying I love Tonks, I would like to eventually love you also.

She deflated and sat herself down across from him in the only chair in the room, a nice comfy armchair. "I'm sorry if I seem cold, it's just this isn't what I pictured my life to be like."

"It's ok I understand, I didn't think I would get married for a while or at all. I kind of have a madman out to get me." He finished with a shrug.

Kara looked at him in question, he let out a sigh and started telling her about his life, leaving out the abuse he suffered with his relatives. It was too early to open that can of worms. Explaining Voldemort was relatively easy, Tonks and Sirius had helped him overcome his insecurities and doubts over the past two years.

"How is this Voldemort guy still alive? I thought you said your mom beat him when you were a baby."

"That's the million-dollar question. I'm sure Dumbledore knows but he has neglected to share that tidbit with me. Hell, he didn't even tell me about the prophecy until after Sirius died." He finished with a grumble.

She looked at him incredulously, "This Bumbles guy sounds like an ass."

He let out a peel of laughter at what he now knew would be his favorite nickname for his headmaster.

Suddenly a knock at the door broke him out of his thoughts, his wand shot to his hand as he utilized one of the very few wandless spells he knew. He looked at Kara who went rigid as she tensed and readied for action. She nodded to him showing him she was ready.

He approached the door wand at the ready, he hid it behind his leg as he looked out the peep hole to see what looked like a hotel staff member. He slowly opened the door keeping his wand at the ready.

"Good morning, sir. Here's your papers you requested be delivered last night." The man handed him a folder, with a quick nod the man left.

"What's that?" Kara asked.

"No idea, let's find out."

Before he opened the folder Kara stopped him, "Shouldn't we wait for Tonks?"

He let out a nervous chuckle, Dora would kill him if he forgot to check it for spells. Since the man was holding it closed it meant that there were no spells initially, there might be once opened though.

He set it down on the bed and started weaving spells from his wand, just like Dora taught him. He came up with no spells or curses or even potions, it looked clean. He would wait for Dora though, so she could double check. His wand felt off though, like it was fighting him, it confused him, he'd worry about it later.

He didn't have to wait long as a freshly showered Tonks emerged fully clothed after her shower.

"Wotcher Har, Kara, what's going on, I thought I heard a guy at the door."

Harry looked at her in confusion, "How could you hear that he was pretty quiet."

"Oh, that's part of the good news, I'll explain after you explain the man at the door."

Harry looked at Kara who decided to explain, "Some guy dropped a folder off, I had Harry wait to open it until we all were here. I mean it could be for any of us after all."

Harry looked at her startled, "I thought you had me wait because it could be cursed."

Kara looked at him in shock, "That can be done?"

Harry nodded sheepishly rubbing the back of his head, "Yeah, my life is complicated."

"Our life now lover. Kara needs to know everything, she's a part of this now." Tonks added, causing Kara to nod her head in agreement.

Harry let out a sigh, "I know, I already explained Voldemort."

"Yeah, I'm sure you glossed over a few bits, probably about your miserable excuse for relatives."

He noticed Kara looking at him in question, "I'll explain later, I'm too sober for that discussion now that I know I can get drunk."

Tonks let out a snort, "If you think I'm going to let you ever drink that much again, you have some screws loose."

Raising his hands in annoyance, "Fine, later. Let's find out what this is first."

Tonks started her standard array of detection spells on the folder, "It's clean." She stated after she finished.

She picked it up and removed the documents after a minute her jaw dropped.

After a minute of her expression Kara and Harry both got fed up, "TONKS!"

She jumped, "Sorry, Har you cleaned the casino out it looks like, probably multiple." She finished with a mutter.

Harry grabbed the document and saw the new amount deposited in his recently made swiss bank account.

Kara read over his shoulder, "Whoa, you're rich."

Letting out a snort Tonks addressed the blonde, "Please, he was rich before and technically we're rich."

Harry let out a stammered, "I won 32 million dollars."

"Don't forget 20 percent of something called Luthor Corp."

Kara grimaced, "Ugh Luthor Corp, my cousin just put Lex in prison. Here's hoping it sticks this time."

Tonks looked at her wife, "Your cousin, any chance he could help us out with Voldy?"

Kara looked at her in deep thought, "Maybe, he usually doesn't like getting involved with politics and from what you've two told me it's more of a civil war then anything. Most likely he won't want to get involved unless he crosses borders. Kal has always been a stickler for following rules to the letter."

"Well, Fuck."

Tonks slapped his arm, "Language hubby, besides we can do that later." Causing Kara to snort at his blush.

Clearing his throat to get their attention he asked Tonks, "So, can you tell us the good news?"

Tonks perked up at that, "Ok, so this marriage is a give and take type. It's incredibly rare, it was mostly done hundreds or even a thousand years ago when the couple were of a different species. It's how the first veela were created, a wizard with a succubus."

Harry shook his head, "I'm not following Tonks."

"It's a marriage of equals if you will, she will get some magic ability from us, and we will get most if not all of her Kryptonian abilities."

Kara's face turned into one of surprise, Harry meanwhile grew excited, "I'll be able to fly!" He turned towards Kara and gave her a hug while laughing in excitement.

"We'll be able to fly love. Though we will be much weaker compared to her, she might be as strong as us magically though since there is two of us rather than one." Tonks said.

Kara pulled away from Harry, "I'll be able to do magic?"

Tonks nodded her head, "Yeah, this type of marriage is supposed to be one of mutual benefit. Long ago a succubus married a wizard in this type of marriage, so that she could have access to magic, their children eventually became what is known in our world as Veela. Veela are beautiful women that have that can pull those that are attracted to females to them, they also can turn avian and throw fireballs."

Tonks paused looking at them both, "Now, Harry and I will get most if not all of your natural Kryptonian abilities, we will be much weaker compared to you though. If you can lift one ton, we could probably lift half or maybe a little more."

"But my Kryptonian abilities are due to my physiology rather than a powerset I'm born with."

Tonks looked at her in confusion prompting her to explain, "My body metabolizes yellow solar radiation, it's what give's me all my abilities. Not that I use them all that much, krypton had a red sun, as I told you before I didn't arrive on earth until I was 13. It took a few days for my powers to kick in."

"Hmm, still counts. I can already tell my body is enhanced more than it should be, hence how I heard you while I was in the shower. Me and Har are metamorphs, which is basically a very rare type of magical that can shapeshift, we mostly freeform it though. That's were we have our base look and change our hair color or something. You might get that too."

Tonks paused before continuing, "Anyway as a metamorph we had to learn how our body works completely, it's how I was able to use your super hearing so easy, we have to be in complete control to control our morphs. Har might take a little bit though, he only realized he was a metamorph less than two years ago, I've been doing it most my life unconsciously."

"Will it help me control my powers better, not that I don't have control." Kara asked.

"Why afraid of breaking us in bed lover?" Tonks teased.

This caused Kara's face to go red, "No! I was just wondering because I don't want to hurt anyone. I do have to be careful in every relationship though, it made sexual relationships almost impossible."

"Now that we will have some of your powers hopefully that will mean you'll be able to relax more. We won't break easy." Tonks added softly.

Kara's face was still red though the color had lightened, she let out a small smile in acknowledgement.

Tonks waved her hand in front of Harry's face to break him out of his thoughts, "Har? What you are thinking about."

"I'll be able to fly!" He said beaming at her.

She let out a melodious laugh as did Kara, "You're still on that?" Kara asked.

"Please, he loves flying, though magicals use brooms or carpets."

Kara looked at her not sure if she was joking, so she asked.

"Oh, yeah it's a total stereotype but it's a true one." Said a smiling Tonks.

Harry turned towards Kara, a childlike gleam in his eyes. "Can we go fly?"

Kara let out a nervous chuckle, "I kind of don't use my powers, besides you might want to soak up some yellow sun radiation for a couple of days just to be safe." Tonks nodded her head in agreement.

Harry let out a sigh of disappointment, "I guess that's fine. You know these last couple months have been a mixture of anger, love, disappointment, and now hope. I just wish Sirius was here, though he would probably take the micky out on me. I wish I would have had more sense and hadn't needlessly led him to his death."

Tonks laughed oddly, "Yeahhhhh, about that."

12 Grimmauld Place

"Albus sometime early this morning the Dark Lord let out a scream of agony and dropped, it took him five minutes to come around. He was very angry and required multiple potions, his arm also started to decay, he halted it, but he will need a new one. He's already having a ritual prepared." Severus Snape said to the leader of the light.

Albus looked thoughtful, "Did he say what happened?"

Snape shook his head, "No, but he's convinced Potter had something to do with it. He can't feel their connection anymore."

Albus face turned from shock to completely serious, "Are you sure?"

Snape nodded, "Yes, the connection is gone."

Albus let out a sigh of relief, "That's wonderful news, Harry won't have to die anymore."

"Hold on what do you mean he won't have to die?" An enraged voice snapped from the doorway to the kitchen.

Albus turned to the voice, "I believed that a part of Tom's soul was anchored behind his scar, I have tried for years to figure out a way to remove it. All I have ever found was for destroying the vessel. If the anchor wasn't removed Tom wouldn't be able to be vanquished."

"Call it what it is old man, a horcrux. You left one of those in my godson for over 16 years!"

"I'm sorry Sirius, I did all I could but I'm not infallible. I've been searching for an answer for over a decade." Albus said wearily.

Sirius Black stepped into the room, "Does this mean Harry is dead?"

Albus shook his head, "I don't believe so, Tom would have rejoiced at the news." Turning towards Severus, "Has he mentioned sending anyone after Mr. Potter."

"No, he doesn't even know the boy is gone." Snape drawled.

"We need to get in touch with him to find out what happened then." Sirius said.

"You had the insane idea to fake your death and send him to Vegas, this is on you Black." Snape muttered.

"Quiet Snivellous." Causing Snape to raise his wand in his hand, which caused a reaction from his hated schoolmate when Sirius raised his wand.

"ENOUGH!" Albus ordered, he was tired of the same taunting these two had been doing for the past year and a half.

Snape and Sirius lowered their wands.

"When is he due to return Sirius." Albus asked.

"He's still got a week left; he's only been gone a week. I kind of made a stipulation in the will that he had to be gone for at least two-weeks." Sirius said scratching the back of his head.

"He is going to hate you mutt; you have had him believe that you were dead for over two months." Snape smirked at Sirius.

Sirius looked on the verge of insulting Snape but thought better of it, "Tonks was supposed to tell him before he came back, I told her to wait until the end of the trip so he could have fun and not be upset at me."

"Ah, yes, Potters little girlfriend. You must really want them to break up, he's going to be furious with her." Snape still smirking at Sirius said.

"His little girlfriend, I thought they broke up." Albus interrupted Sirius retort.

Snape let out a snort, "Please those two just did that for the public since Nymphadora wanted to train to be an auror and with the ministry at loggerheads with Potter, they felt it prudent. Besides those two were shagging like rabbits during winter break, you could tell just being in their presence for a minute."

Sirius let out a laugh, while Albus looked deep in thought.

A minute passed until Snape asked, "Albus?"

"I'm sorry dear boy, just lost in thought. Sirius do you know if Nymphadora knows about the marriage of equals."

Sirius paled, 'You don't think?"

"I'm not sure my boy, but it's possible that could have removed the anchor. It was a theory I had but not one I was willing to test. It would have also needed someone stronger than Mr. Potter."

Sirius looked at him incredulously, "You would rather he die then get married."

Albus shook his head, "I didn't say that it was only a theory. Besides there are very few people that are as strong as Harry. I was still holding out hope that I could find another way to remove it. Without his other anchors we still had time anyway, I'm gratefully that you two helped me recover the ring, I fear that it would have killed me if I was alone."

Sirius let out a sigh, "So, how many does that leave us with."

"I have reason to believe Tom made 7. The ones I know of are the Diary Harry destroyed in his second year, the ring which we destroyed, and finally Harry. I believe his snake Nagina is one as well, I also believe that the cup of Helga Hufflepuff is another, and finally Slytherins locket. Which leaves something of Ravenclaws."

"Merlin, no wonder he's insane." Snape muttered.

"He divided his soul into 8 parts." Sirius said shocked.

Albus sighed in disappointment for his former pupil, "I think he meant to make his soul sevenfold, but when he attempted to kill Harry, a piece broke off and attached itself to the only living thing around."

Sirius shook his head in disgust, "Do you have any clues to where the rest are?"

"I have some theories, but nothing concrete. I plan to start Mr. Potter's advanced tutelage this year, hopefully we will be able to uncover the whereabouts of the rest."

Sirius looked at Albus, "You will call me when you go after anymore, the rest could be protected. We need to do this together, Remus included."

Albus looked at him hesitantly until Snape said, "He's right Albus, we need to do this together. Bellatrix and Narcissa already tried to get me to swear an unbreakable vow to help Draco with killing you. I managed to placate them with a fake oath. The Weasley twins managed to do something right with those fake wand of theirs."

Albus looked down at his clasped hands, "You two are right we do this together." He finished resolved.

While this discussion was going on an ocean and continent away Harry James Potter was undergoing much emotional discomfort as he went back and forth from happy to angry at his Godfather's survival. Things were undoubtably complicated for the young Lord Potter-Black.

So, this is set in the Arrowverse because it's easier for me to write it in a less complicated universe than say every goddamn comic of Supergirl. IT is subject to change though; this is just something I wrote in a couple of hours.

It is not edited yet, and it needs a lot of work, I'm releasing to get peoples thoughts, though the pairings won't change or be added to. A three-person relationship is big enough (Not a big fan of harems, unless they actually contribute to the story, which isn't very often.)

This story is also very AU, considering it takes place within the structure of the DC Universe. As stated at the top the ages of the characters are different then canon, I did this for multiple reasons, one of which being 15/barely16 year old's don't get married that often (for good reason).

This story will be majorly edited and even it being set in the Arrowverse isn't set.

Don't ask for updates for this story it will not be getting new chapters unless I'm bored or most likely when An Unexpected Development and A New Dimension Same Problems is finished.

A lot of people will probably hate the concept of the marriage of equals, but I wanted people that Kara could truly relax around. I also wanted Harry with the powers of a Kryptonian, he will also be a metamorph but not a parseltongue, with the removal of the horcrux he lost the ability. His Kryptonian powers will be much weaker compared to Kara, think superboy from young justice compared to superman, he will be able to fly though. There was no way I could give him some Kryptonian powers without the ability to fly. He will not have heat vision, Ice breath or X-ray vision though. Just the flight, strength, invulnerability, super hearing and super speed. Still weaker than Kara's though.

As for the characters personalities:

Kara: This will be her first true relationship (I can't remember if she had any, I need to do a full rewatch of the Arrowverse, I own all the sets on Blu-Ray for the full Arrowverse, I just need to actually watch them again. My wallet hated me for that purchase, thankfully I accumulated them gradually when they released.) Kara is going to be insecure but also hopeful, she is going to be hesitant for the relationship so it will be slow going. Just because they are married doesn't mean it's going to be all flowers and romance right away; it will be a gradual thing.

Tonks: She is going to be happy but also insecure that she will never match up to Kara (This will change, it's as much as a Harry/Kara as it is Kara/Tonks and Tonks/Harry story) The insecurity will come from the years where people tried to treat her like an object, even if in the last two years she has been basically Harry's stable girlfriend.

Harry: He will be canon like, but he will also have a backbone, years being with Tonks broke him somewhat out of his shell. He will still regress to the moody scared little kid that was locked in the cupboard. Trauma after all doesn't just disappear, it requires therapy and time.

I am a huge DC fan, that's what inspired me to write a crossover story. I like Marvel but compared to DC Comics it is lackluster in my opinion. The movies are much better though, animated and TV wise though DC Rules IMO, even if Marvel is catching up tv wise anyway.