I'll take a deep breath...let's give this a whirl. Sadly, my diabolik lovers and gravity falls crossover hasn't gotten enough attention as I hoped to so I will try my luck with this stupid-ass story idea with a weird plot and an insane OC. Before you say anything...this will always focus on DL but have little cameos or hints to other characters. Nikki's personality is based on my own attitude and how I act around little kids...ok I actually minor swear but...everything will come together. Please be successful please be successful.

I groaned as I felt little bodies jump on my bed.

"Ma'm, ma'm wake up wake up!" three little voices chorused.

"You little pieces of...shizz. What the hell? It's like fricking midday, I spent yesterday listening to your annoying mum whine about how Ayato shouldn't have fun too much. Also how many times have I told you guys NOT to call me ma'm I'm a couple thousand years old give or take." I complained, nevertheless rolled out of bed with my hair messed up like a bird's nest. Sitting on my bed were Laito, Kanato and surprisingly Ayato.

"Nikki-oneechan! Let's play outside. I think there are bats flying around."

"So what? You see bats everyday, doesn't Kanato like...catch them and burn them alive or something?"

"Yeah, it's fun to see them writhe in pain." He cheerily replied, rubbing his teddy's head.

I hesitated. This child had problems, why did that GUY hire a babysitter and not a psychiatrist to handle Kanato.

"Alright, give me a sec," I muttered, kicking my feet off the bed and scratching my head. Since the great Cordelia was too busy dealing with her multiple romantic life, the king of Vampires hired me: a fallen angel to take care of his three hyperactive triplets and occasionally his three other sons. One born from the fiery pits of anger management problems. Another is a sociapath who loves pelting his smart-ass comments at me. And the final who seems to be normal enough but if you know this twisted family, worst comes to worst that one of them will end up torturing thousands of innocent people and setting villages alight.

Did I mention my client has a creepy younger brother who enjoys stalking women?

With those requirements, three letters come in my mind.

F

M

L

After styling my hair in my usual pony tail, I set out for another torturous day at the sakamaki mansion. As I ambled with boredom out of the hallway, I noticed Miss Cordelia looking more...seductive than usual. As she approached me, I curtised.

"Miss Cordelia," I addressed, if there's one thing I know is that if you piss off one of Karl-heinz's crazy wives, you know you'll end up with a death sentence.

"Ah! Nikki-chan, how ARE you?" She flirted, she held my head against her bust and began to twirl one of my stray locks.

"I'm fine Miss, just got up and ready to tend your sons." I replied, I was tempted to not punch her hard in the face. I slowly slithered from her grasp and was about to walk in the direction I was going to when I saw...that guy. With his gren hair pushed every and his creepy breathing, with a girl like me you're known to get the shivers.

That's when crashing and cursing came from the kitchen.

That's my cue to leave.

Running like a madwoman I noticed already there was crying from ALL 6 sons were there.

"What the frick frick!" I screamed, if you're surrounded by a bunch of little brats between the ages of 6 and 9 you know you can't curse as much as you can. Reiji, was crying his eyes off with his glasses on the ground. Laito was hugging his brother Kanato, who wielded (I shit you not) a butter knife, and both were bawling their eyes out , making nigra falls look like a leak of a roof. Ayato was also joining the giant cry fest had a GIANT bruise on his face and 99% was definetly due to Subaru who was standing in front of Reiji. The youngest sakamaki was also crying a bit but seemed to do little sniffles.

The eldest, Shu, seemed to be mooching over how he slipped after standing on the chair.

"AAAAAAAAAH! WHAT THE HELL?!" I screamed on the top of my lungs. All the kids stared at me.

"Nikki-oneechan!" They cried and ran into my arms. They all ran and huddled around my legs like cute penguins. Then they all started accusing each other.

"Ayato took Kanato's teddy and wouldn't give it back."

"Ayato punched Reiji and wouldn't apologise."

"They were being annoying to the great Ayato-sama and Kanato stabbed me with a butter knife."

"I tripped as I got Kanato's teddy."

Note to self: MAKE KARL-HEINZ PAY ME MORE MONEY

Groaning with annoyance, I managed to get Kanato's teddy back and confiscated his butter knife. With that I dabbed some ointment on the the bruises of the three eldest siblings. Funny thing is that I borrowed (read stole) that substance from Karl-heinz's lab. It's funny what you can find in there. Arsenic, bruise healing ointments. Hell I even found some meth but that's a story from another day. After that I sat them all on the giant table and crossed my hands. If there was something that all the kids knew, if I crossed my arms: shit was going to go down.

"Seriously guys, you're like what a few thousand years?" I muttered, all the kids shared a collective shrug. Who am I kidding, these were vampires we were talking about, those guys never gave a crap about their age. "I'm not going to be around to babysit you guys when you're like what teenagers? It's weird for like a fifteen year old to baby like a sixteen year old. So it's time that you guys mature. Look you're brothers and I used to get in a HELL lotta troubles back in heaven and look where that got me. Stripped from my awesomeness and sent down to live as a risen devil-"

"Fallen angel." Reiji corrected.

"-good boy, a gummy bear for you!" I praised.

"But I want cookies." He whined.

"Shut up and let me lecture you guys. What I'm trying to say is that you need to get along with each other. In the long line, who's going to share your sympathy when someone like...I dunno your mum dies or something?" I muttered, the brothers looked around at each other. They looked slightly inspired but mostly salty. If I need to describe their saltiness then please listen to this description.

Think of the ocean, now cube it to infinity. Then times by six. That's the saltiness you'll get from all of those brats combined.

"If you apologise then I'll let you guys have passes on your day-to-day life and then we can visit my friend Kalvier?" I bribed with my sing-songy voice. After a few minutes of the sibling discussion, Shu as spokeperson announced their decision.

"Throw in cookies and we're in!" He betted. Shooting them my winning grin, I shook their eldest brother's hands, making them all begin this mumbling of 'sorrys' across the table.

Man I'm good with these kids. Like before Heinz hired me to babysit those brats, they bickered 24/7. To my luck, almost all of them stopped bickering with each other and decided to go their own separate ways.

"Nikki-oneechan! Come play with me!" Kanato started tugging hard on my sleeve. I reluctantly followed the small boy to his favourite place of the entire mansion. His doll house.

Now, when I say doll house, don't think it's one of those cutesy mini victorian doll houses. It's like a giant room dedicated to all these pretty women Kanato killed and turned into his porcelain dolls. With their listless eyes, they creep you out more than that tape that can kill you in a week. I sat next to him and examined the various mirrors.

"Nikki-oneechan, who goes to Scarborough fair?" He asked, turning to me. I smiled and rubbed his head.

"Those in god's favour."

"But god is a fairy tale?"

"He's anything but a fairy tale, but if there's one thing that's worse than God it's karma. What comes around goes around." I explained, Kanato nodded his head.

Are ya goin' t' scarboro fair...

parsley sage, rosemary 'n thyme

Remember when I pissed yo mama off

N' thus she's ain't a true friend o' mine.

Kanato gave me a funny look.

"That's not the words, Nikki-oneechan!" He pouted, I cracked a goofy grin.

"Heh, don't stick to the rules so much, Kanato."

That's when bat screeching noises came from outside. There was Ayato and Laito having the time of their lives. Noticing Ayato had trouble catching that one bat in the air, I decided to give him a little surprise. Sneaking up behind him, I hugged him from behind and lifted him in the air.

" 'Ello bro, whatsup?!"

"HIGHER Nikki-oneechan! Higher!" He begged, activating my wings I flew in the air and Ayato caught the little blind bastards with one fell swoop. Once regaining my balance I noticed the familiar shape of Miss Cordelia approaching us.

"Ayato, is this where you've been? Wasting time?" She scowled, her flirtacious demouner was gone and replaced with her normal abusive attitude.

"B-but..." Ayato stuttered, I interrupted him and stepped forwards.

"With all due respect Miss Cordelia, I believe it is vital for Ayato to regain his exerci-...wait a minute."

I knelt down and began tugging on his cheeks. Ayato blushed and attempted to push away from me.

"I swear you've gotten a bit pudgier...wait have you been eating sweets?!" I growled, Laito looked sheepishly.

"Laito, is there something you want to admit?" Cordelia hissed, she placed her hands on her hips.

"I bothered Ayato when he was studying because I thought he was lonely. I gave him all my sweets because you never give him dessert..."

Before Cordelia could raise her hand, Kanato tugged his mum's dress.

"Mother, do you want me to sing for you?" He inquired. The woman's rage melted and she knelt to her favourite son.

"Yes my little songbird...Laito...don't ever disturb Ayato again. Ayato...don't ever eat sweets given by your brothers. I don't want you getting a cavity." She snapped, with that she led her little canary to that bench area so he can entertain the gorgon. Breathing a sigh of relief.

"Be glad you guys are brothers...now I've gotta check on the rest of them. Stay out of trouble you two!"

With that I took off running towards the main house where I would usually find Beatrix' sons. As I walked around, I bumped into Heinz' second wife, Beatrix.

"Miss Beatrix." I curtised, Beatrix followed my example before letting out an exaperated sigh.

"He's missing AGAIN?"

"Shu? I'm sure he's just mucking about. Kids do that all the time." I reassured, from the corner of my eyes I saw Reiji. I noticed his glee of how Shu was disappointing his mother.

"He'll be fine Miss Beatrix. Look if he isn't here by dark, I'll look for him."

Beatrix took deep breaths before walking past me into the garden. Once she was gone, I bore my grey eyes deep into the boy who was spying on us.

"Reiji, I'm not stupid like Karl-heinz. Get yo pasty white ass out here and tell me why the hell are you spying on me."

The boy crept out before grinning evilly. For a brat he could make shivers go up my spine.

"Cursing in front of a child, proves how much of a bitch you are."

"Listen you, I don't know what you've got against me but you better show me damn respect. I won't care one bit if Shu becomes heir because I'd rather have him than a know-it-all who knows nothing. Take a page of Heathcliff." I snarled, Reiji stopped. He looked as if he was going to cry so I crammed a giant lollipop in his mouth. He sucked it with gusto.

"Shh...don't tell your mum." I winked, wiping his tears. To bribe him even more, I gave him more cookies. That's when the window opened, I blinked and noticed it was Shu and some weird ginger kid.

"Oh hey Shu." I smiled, I hefted him up, by the time I turned to the window, the unknown kid was gone.

"Who was he?" I asked, Shu looked innocent and munched an apple.

"A friend."

"Alright smart guy, I understand that studying is a pain, but you better step up your game. Your salty brother is catching up, I like all of you but personally something wrong's with Reiji, 5 bucks says he burns a village down."

Shu pouted, I crammed a lollipop in his mouth. He sucked it with eagerness. At that moment, a scream came.

"Crap, Christa!" I cursed, with that I bolted down the hallway. I noticed Subaru sitting outside of his mother's room.

I called for the child but he scoffed like that salty brat he was, I swear if I was legally allowed to beat these children then Subaru would return with a red butt.

"I don't need your help." He began, then pulled his fist and aimed at my face. I swerved to the left and his fist collided with the wall. He squealed like a pig.

"Ah shit that hurt!" He cursed, I frowned and hit him on the head.

"Don't curse kid, it sucks when Karma comes and bites your butt." I sighed, Subaru leaned against the door but his arm hinted that he hid something behind his back. With the skills of a ninja, I snatched that something he hid.

"H-hey, give it back!" He accused, he started running towards me but I placed a hand on his forehead to prevent him from attacking me. I examined the object carefully.

"A white rose? Not exactly matching since she isn't innocent anymore!" I replied, Subaru pouted.

"It's what I could find!" He admitted, I bit my lip. I hate to admit it but Karl-heinz' flower choices aren't very sweet.

Black roses, peonies, orange lilies and yellow hyacinths.

If you spoke flower, then you know that Cordelia's life is pretty...interesting? Beatrix didn't have a lot of choices but Christa had a little patch of white roses dedicated to her. More screaming came from Christa's room, which ended up eventually attracting Subaru's five older brothers.

"Is that Miss Christa's screaming...it's sweet isn't it teddy?" Kanato commented, I pinched Kanato's ear before glaring at the boys.

"I still don't get why his mom's such a crackpot! She's like two people!" Ayato complained, I saw tears streaming from Subaru's face.

"Ayato, don't be like that! Apologise to Subaru," I ordered, the eldest triplet grudidly obeyed me, "I'll tell all of you what happened to Miss Christa when you're older. Now, come with me to the gardens, I think I know what we can do to cheer her up."

It took us a couple of minutes to do what I intended but with the brother's co-operation, I managed to muster 6 white roses.

"How are these going to help Miss Christa? If I recall, white rose coresspond to innocence and purity..." Shu trailed off.

"Ok guys, just line up from oldest to youngest and go into the room. Remember, wait until I get in the room, I'll give you a signal for when you should give the roses to Miss Christa." I ordered, with that I pricked my finger against all six roses. I winced in pain as blood contracted but it was worth it. The white roses suddenly flushed to a dark pink colour, I handed all the flowers to the boys before opening the door.

Christa's room was an absolute mess, with turned tables and broken mirrors. A pile of withered flowers laid destroyed, I recalled Subaru gave her that boquet to her a week again.

"Miss Christa, you have guests," The woman turned and threw something at me, I opened my wings and used them to shield the object. "Miss Christa, your son is here." I put emphasis on the word 'son'.

"I'm trash, I'm evil...I should die...I should..."

I grabbed the woman and forced her into a hug, I noticed that she started sobbing in my shoulders. With that, the boys entered the room with their roses. Seeing her enemies' children present her roses...really teared her up. I notice that Subaru was smiling from ear to ear at his siblings. I relaxed a bit.

They really do care for each other...I hope for a brighter future for them compared to me.

Couple of years later and Yui's POV

I sighed with annoyance. Yet another troublesome day and THIS time I had to withstand the abuse of ALL the brothers. Rubbing my bite marks I made my way to my room. Usually, the window would be closed but I heard the wind whistling in the night. I gasped as I heard a murmur of a voice, it was feminine and around the early teens.

"Man, they really girli-fied the place here. Too bad it doesn't have like my stuff. I think they trashed all my junk once I left the place." The voice complained, I stick my head closer to the gap and noticed it was a girl around the age of fifteen. She looked like your typical girl, black hair and white skin. The only thing weird about her was...well...the fact that there were GIANT WINGS sticking out from the back of her...well...back? It seemed to resemble those of a crow with sleek ebony feathers. I gasped as I felt someone place their hand on my shoulder. Hoping it wasn't one of the brothers, I bolted into the room and slammed it shut. Obviously she heard me. The girl gave me a funny look.

"Um...this is the sakamaki house right? Not a haunted house?" She replied, I gasped a bit.

"You're not...one of them right?"

"No I'm a unicorn that was given black wings because a triangle demon with one eye cursed me."

"Really?"

"Do you need glasses Sherlock? I'm a fallen angel. Y'know one of those guys who commit something bad and those annoying seraphs send you flying down to earth to 'suffer'." She replied. I wasn't fond of demonology but I heard my father talking to it about angels for commiting sin, due to her attitude I felt like it was a topic that she was sore about.

"Um...I'm Yui Komori." I smiled, offering her my hand. She looked at it sceptically but accepted it anyway.

"Nikki Kurogami. Say have you seen a couple of brats around here? Six of them? They're pretty annoying and I was sent by that dude to keep an eye on them to make sure that 'the bride' wasn't dead yet." she explained, as she ranted, her wings faded away.

*bang bang* "OI CHICHINASHI! OPEN THE DOOR ORE-SAMA WANTS TAKOYAKI!"

I gasped, I forgot about Ayato and the door but how was I going to explain to him: yeah there's this fallen angel in my room and apparently she knows you also please don't suck my blood.

Before I could stop her, Nikki opened the door.

"Huh? Are you Ayato or Laito?" Nikki asked, Ayato's eyes widen.

"Ma'm?" He whispered.

*crash bang*

"WHAT THE HELL AYATO? IF YOU WANT ME TO DROP FROM THE TOP OF THE HOUSE AGAIN THEN DON'T CALL ME THAT AGAIN!" Nikki threatened, she wielded a wooden paddle. Ayato rubbed the red lump growing on his head.

"Nikki-oneechan, what are you doing here? I thought the old man didn't need you anymore."

"Yeah well that dude brought me back here. How about you summon your brothers in the living room since I have like important messages for you guys."

It was embarassing as she seemed to treat the boys as if they were little kids.

"Wow, looks like puberty got on your good side, amright Yui?" Nikki joked, she placed an arm on Laito's shoulder.

"Ayato right?"

"Eh~ Nikki-oneechan, you've already forgotten me?" Laito whined, he draped both of his arms over her. She squeaked in fright and attempted to heft his body off her.

"Crap! You're heavy! I thought I told you to cut down the sweets...or was that Kanato? Speaking of Kanato, get your butt here. I wanna see if your cheeks have gone squishy!" Nikki ranted, I took notice on how she acted around the brothers. She reminded me of a low-paid baby-sitter who was on a shortage of caffeine.

"Reiji! I told you to stop eating cookies! Your cheeks have gone more squishy." She complained.

"Okee, pleash shtop, muh cheecks share hurting so much." He managed, Nikki released them and climbed on Subaru's back.

"Aww, how cute. You've been stronger! Remember when you used to cry whenever I refused to give you a piggyback. Aww, your rosy cheeks!"

"Ah! S-stop it! Not in front of Yui."

I giggled a bit, even if they seemed to torture me they acted like little children, they all glared at me.

"So I haven't seen you guys since...well shit happened? I can curse right?"

"You fucking can." Ayato snarled

"You better not! I'll cram soap so far down your throat that it'll taste like sakura blossoms! Wait you changed the soap right?"

"I think it's lemon zest." Reiji added.

"Gross, but yeah. That guy started getting sus, especially after this Cordelia incident. You know how shinigamis hate when people cheat death."

"Yeah some gay guy came over with a chainsaw and his pet Reiji came and lectured us about cheating death."

"Hpmh, I'm surprised you paid attention to that speech. Good-for-nothing." Reiji spat. I looked nervously as Nikki shot a glare at Reiji. Usually if you did that, you would get in an intense staring competition until someone broke. In this case it was Nikki.

"Alright, everyone to bed. I don't wanna need to get two pans and make a racket. Reiji, which room will I take?"

Before I could say anything, Ayato interrupted the 2nd son's suggestion.

"You can have chichinashi's room. She'll be sleeping with me."

"B-but Ayato-kun!" I stuttered, attempting to break out of his grip, Nikki gave me a strange look.

"Ne~, teddy. Yui-chan can sleep with us. It'll be like...sleeping beauty." Kanato smiled. With that, Nikki clapped her hands.

"It's fine. Yui, I'll sleep in the chair of your room. You can have your bed. Alright everyone, bed time!" She ordered, she chased all the brothers to their nightly routines. Even helping them brush their teeth and making hilarious remarks.

"Kanato, your teeth are horrendous, when was the last you saw the dentist?"

"Spick and span as usual Reiji, though try not to bite off my fingers."

"Laito, no. Bad boy. No touch on chest."

"Shu, take off your earphones or I SWEAR I'll make you feel a shock that isn't of ecstasy."

"Subaru, quit struggling. I can't brush your teeth if you keep wriggling like that."

"Ayato, say that word one more time and I'll cram something that isn't also soap down your throat."

Nikki even helped me with my teeth.

"Are you sure, Nikki-chan? I can handle it myself."

"Nah, it's cool Yui. Also, don't call me Nikki-chan. It makes me sound like a pre-schooler." She chimed in.

Thinking of breaking the ice I asked her.

"What's your relationship to Karl-heinz?"

She hesitated, pulling the toothbrush away from my mouth.

"U-uh you don't have to answer it, I was ju-"

She shook her head, telling me it was fine. With the sorrowful look, I could tell it wasn't fine.

Nikki POV

Walking down the hallways of the Sakamaki mansion gives me the creeps. As I was about to proceed in Yui's room I noticed someone was behind me. Turning around I took out my wooden paddle.

"Gross, it's you." I winced, Christa standing in front of me. I remember that she used to be like a straight-up chicken but something about her was different. Especially about her eyes.

"It's been a while, Nikki-chan."

"Please don't call me that, it makes me sound like a pre-schooler."

Christa placed an arm on her hip.

"Why be so cold darling."

"You know why, aren't you supposed to be dead?" I shot back, she let a loud hearty laugh.

"To think that I'd let Karl-heinz forget about me! I'll kill him but after killing his sons. Richter proved not to have any worth to me so left him in hell and once again the first bloods will reign supreme."

"Wow, bitch." I muttered sarcastically, I idly fiddled with my hair but still wielded my wooden paddle. The hag furrowed her brows.

"Your respect is admirable...for someone who fell from heaven."

"Shut up."

"For someone who betrayed the one they love."

"Shut up."

"For someone who killed...him."

"SHUT UP!"

The lady raised an eyebrow before moving towards me quickly. I pulled my wooden paddle back and was about to smack that bitch.

"You better stay dead, Cordelia!" I threatened, with a flash she dissipated. I breathed heavily.

So she was alive. Using Miss Christa's body as a vessel? That bitch. If there's one thing I wanted to do is make sure that Cordelia suffers a lovely and painful death. If I had to recommend a couple of songs for Shu they would be Wolf in sheep's clothing and Cordelia's pained screaming. Dubstep would be awesome when that purple bitch is screaming her head off. I kept taking deep breaths until I felt someone tap my shoulder.

"Ms Nikki?" I turned around to see Yui giving me a worried look.

"Oh..hey Yu, what's up?"

"You look like you've seen a ghost."

"Oh...ha...it's nothing...now what are you doing out of bed? Come on! You have school tomorrow." I scolded, pushing her to bed. Yui looked at me.

"Aren't you tired, Miss Nikki?"

"I'll be fine. Just get to bed."

After pushing Yui, in the bed, I opened the window to her room. Sitting on the ledge, I admired the moonlight.

"Heh, I remember a sweet yet foolish girl telling me this...'a half moon. It has a dark half and bright half. Just like me.' Shame I never met her again...I wonder if she ever met up with the one she loved." I recalled. My wings flapped against the cool breeze before wrapping myself in my feathers. Drifting off to sleep.

I hope this is a succesful story idea. I'm not a fan of ocs, especially the mary sue oc of each series. Like almost every series has that typical character e.g. Yui's twin badass sister (DL), Ciel's long lost twin sister (Kuroshitsuji), child of Hades (Percy jackson). My previous oc (Kitagawa Hayami) almost fell into the badass sister-like figure in my Red like roses, red like blood story but something happens to her and you should check it out. But who is HE? It's not Karl-heinz. Why did Nikki return after so long? Will this be successful as my RLR,RLB story? Will my GF and DL story be more successful? Will I have the motivation to write more for both stories? Did you get all the references, those who got them will get a shout-out in the next chapter.

PLEASE FAV/FOLLOW AND REVIEW!

AQUA OUT!