Legend:
Character Thoughts: "{abc}"
Character Translation: "abc"

Chapter 1:
Strong Starlight

Five years ago…

"Brother? Brother! What's going on? Why did you…why did you kill our parents?" a young girl on her hands in knees, trying to push herself up asks.

Her brother sighs responding, still holding a blood-covered kitchen knife, "Because Sis…they weren't our parents five minutes ago…"

"The hell are you talking about?"

"Don't you get it?! They were possessed! They were about to kill you! I…I had to do something."

Then the girl notices something about her brother. He all of a sudden has pointed ears and a tail with a furry tuft on the end of it. Black and purple flames dance on the end of his tail and part of his body. She then notices white and golden flames dancing around her, yet she has no tail or pointed ears. Lost in confusion, the siblings have no idea what to do, or even what's going on.

"…Brother…you're…a demon?"

"Oh please, don't act like you've never known!"

"What other secrets have you been keeping from me? TELL ME!"

"And you…you're not a demon, yet you have flames! Just what are you, huh?"

"ENOUGH!"

Later that night, the tired siblings walk down empty streets partly covered in their parents' blood. The boy can't help but weep, tears falling onto the cold ground. The girl is exhausted, but together they hold each other up, until her brother finally collapses. She tries to get him to stand, but he's unable to continue. Before she could drag him into an alleyway, someone appears before them. He is tall, eyes unable to be seen due to the shadowing from his top hat, wearing mostly an elegant white outfit. The girl sees he has pointed ears, a sure indication he is a demon. However, she can sense his overwhelming yet in-control power; he is unlike her brother.

He speaks, "Dear me, what do we have here?"

"Wh-who are you?! The hell do you want?" the girl responds, trying to reach for something use as a weapon, but finds nothing.

"Relax my dear, I'm not here to hurt you. Though it looks like you've already been injured. Tell me, just what have you two been through?"

"Screw you pal! My brother had no choice but to kill our parents because they were possessed!"

"…I see. Did they have blue flames surrounding them by any chance?"

"Only my brother knows. I was in my room studying."

"Well it looks like to me you have nowhere to go now."

"What, are you hear to finish us off or something?"

"Quite to contrary. Although your brother appears to be a demon, I could pull a few strings and have you two enrolled into my academy."

"…You…run an academy?"

"Yes. Ever hear of exorcists?"

"…Exorcists?"

Five years later, present time. The two siblings, Kenta and Seiya Takenaka, have been schooled privately at the True Cross Academy. The brother, Kenta, had enormous power he could not control, and for his own safety was sealed away in secret. His sister, Seiya, decided to stay with him after all they have been through. The man they met before, Mephisto Pheles, was against her idea at first, but allowed it; turns out if she wasn't nearby his power would surge. It took a long time, but at last, they could finally be schooled normally. Kenta's power has been sealed inside a special sword his sister created along with other Exorcists, calling it the Strong Starlight Blade. He can draw it freely and use it as he so pleases. However, a special inscription was engraved into the blade; should it ever come in contact with his own blood, his power would be unleashed.

The demon that had possessed their parents years ago was no incident. As it turns out, Seiya had kept it secret that they are indeed half-siblings, born from the same mother. While she came from two human parents, her brother came from the seed of a demon after her parents split. She never wanted Kenta to know that he was actually a demon, and that he was her Temptaint. Although for some odd reason, she shares the same pyrokinesis ability as Kenta, however, their flames are different in not just color, but power. While his is overwhelming, hers is tame.

That horrible night for the siblings was sparked from their demon father. He grew tired of raising his son as a human, and possessed his wife, turning her against both of her children. Once his powers awoke, Kenta acted purely on instinct, and had no choice but to kill both parents so he and his sister would be safe. He had been raised with a good heart, which overrode his demonic abilities and nature. Seiya is still amazed that his demonic blood turned out to be weaker to his pure heart. Despite all they've been through, they couldn't be a tighter duo.

Seiya, the older sibling is also the shortest one standing at 5'00" and is 20 years old. Her hair is short and black, having it pushed back giving it a smooth yet spiky look; she decided to try and make herself look bigger in some way. Her eyes are a beautiful deep jade green, matching her feather clip given to her from her brother. She wears a red sleeveless top with a white vest and a yellow fur cape, trying to make herself appear tough yet elegant; this of course prompts her brother to tease her about wanting to look like the Headmaster, to which she responds by yanking both his ears. She also wears black pantaloons with a white skirt with golden laces and black boots. Seiya also sports yellow gloves concealing a scar from which her brother accidentally gave her resulting in her new abilities.

Kenta, the younger sibling is the taller one standing at 5'06" and is 15 years old. His hair is short and blonde which is slicked back making him look like a typical "gentleman"; his bright yellow eyes are brought out more by his hair alone. He wears a grey dress shirt followed by a same colored vest and a black long jacket, trying to match the Exorcists around the campus save for the coattails. But trying to stay true to the school uniform, he wears black pants and shoes along with a red loose tie. The Strong Starlight Blade rests on his back in a special case so no one around him is alerted. He is usually optimistic now that he can join in with everyone else, but his sister has become withdrawn and nervous.

Making their way over to the entrance hall which is crowded with new students. Kenta can't wait to meet everyone and flies off into the crowd, leaving his cautious sister behind. For her though, she wouldn't have to go to any actual classes; she graduated already. Her goal now is to locate the Cram School, as she can now focus on becoming an Exorcist. Problem is, it's held after regular school hours, which means she'd be waiting for her brother. Her only option would be to explore the campus and their new dorm. Leaving her excited brother to mingle, she slips away to explore.

It takes her some time to walk around the campus and become familiarized with everything. Seiya takes out her cell phone to check the time quickly seeing she has only a half hour before the cram school begins. Kenta should be getting released soon; she decides to check out the dorm they'll be staying in. But before she could head for the dorms, she encounters a small white Scottish-terrier looking dog.

"…Coulda sworn Mr. Faust didn't allow animals on campus. Unless it's his…but still." She squats down, "Hey there puppy, come here!"

The dog responds as if it understood her and walks over. She checks it over finding no collar or tag. But then she notices something. The pink ribbon tied around its neck, a silver trinket attached that resembles the symbol for an Exorcist.

She nearly freaks as she reels back saying in shock, "MR. FAUST, IS THAT YOU?!"

The dog replies, "Keh, well you're a sharp one, Seiya. Just as I'd expect from you."

A pink cloud surrounds the dog, and as it disappears reveals Mephisto with a proud look on his face. Seiya can't believe that he can transform; she has never seen him do it before.

"Sorry Seiya but the principal can't just randomly walk around campus. I figured I'd come out and see how you were doing so far." he explains.

Seiya stands up replying, "Doesn't make sense, but whatever. As far as my first day, I've done nothing but carefully explore the place. The only area I haven't seen yet is the dorm."

"That reminds me, I forgot to give you something earlier." he pulls out a key. "This is a special key that works on any door and will bring you straight to cram school."

Mephisto hands over the key before counting down from three in German and turning back into a dog. Before Seiya could say anything, he cuts her short saying, "Do me a favor and wait here for me. Not only do I have to find Kenta, but there's one other student I picked up earlier today that'll be joining your Exorcist class. I'll be back~."

"Hey wait…argh!"

Seiya turns around finding a couple lampposts mounted on a cement wall. Agitated at Mephisto, she walks over and sits down, crossing her arms. Looking at her phone, it'd be another several minutes before the classes begin. With nothing more to do, she reaches into her bag, pulls out a manga, and turns to a page she left off on.

"Right, now to see if L can prove Light is Kira…poor guy has no idea how right his suspicions are."

In one of the many hallways of the academy, Kenta has made a couple of new friends. They decide to head for their dorm rooms and settle in. He pulls out his cell phone about to call his sister, when Mephisto, still in his dog form, appears before him. He makes no connections and tries to make friends with the dog, but the tricky demon keeps his distance, getting Kenta to follow him. Each attempt he continues to make trying to pick up the dog results in him crashing onto the ground as Mephisto jumps out of the way.

Down the hall is another student dressed in a black school uniform, and navy blue hair and pointy ears carrying a case-covered sword on his back. He appears to be the same age as Kenta, who ends up bumping into him. Mephisto tries to keep from laughing; getting the both of them this easily couldn't have gone any more perfectly.

The boy retaliates, "Hey man, watch where you're going!"

"Whoa, sorry dude. I've been chasing that dog for the past few minutes." Kenta replies before spotting the boy's ears. "Hey…you're a demon too? Cool, so am I! The name's Kenta Takenaka!"

"Uh, Rin Okumura." the boy responds shaking hands. "So, you're a demon as well then, huh?"

The dog quickly barks, getting the two of them to stop talking about being demons. Mephisto starts to think Kenta may have told other people the fact he's a demon and nearly has a heart attack at the thought. The boys redirect their attention toward the dog much to his relief and gets them to follow him.

Meanwhile at the cement wall, Seiya continues to wait, having forgotten about the time as she reads on in terror.

"Wait, no Light, why would he kill L?! And through Rem even! You evil bastard!" Seiya ends up shouting.

She hears a voice say, "Ha, glad I'm not the only one who really gets into the stories."

Seiya looks up seeing both Kenta and Rin, then looks down noticing Mephisto has returned. Keeping from revealing just who the dog is, she saves the page, puts the manga away and stands up.

"Well Kenta look at you. You've made a friend! {And he's a demon too…his aura is awful strong…it almost matches Mr. Faust's aura…No, I can't start speculating now.} I'm Kenta's older sister, Seiya." she speaks, taking careful notice of Rin.

Rin extends his hand for another shake replying, "He speaks a lot about you. I'm Rin Okumura."

"Hey Sis," Kenta starts, "do you have any idea where this dog came from? I found him in the halls a little bit ago."

"Well…you'll find out soon enough." Seiya replies keeping the mystery wearing a smirk on her face.

Mephisto leaps onto the cement wall, onto one of the lampposts, and sits down before quickly transforming back into himself, shocking both the boys. Their faces made Seiya laugh until Kenta pulls her into a headlock giving her a noogie and demands why she didn't just tell them.

The tricky headmaster tells the boys exactly what he told Seiya, that the director can't be seen randomly walking around the grounds. He then throws each of them the same key he gave Seiya, explaining that the key will work on any door at any time to bring them straight to cram school. The calm, confident look he normally wears becomes one of uncertainty. He wants to say something to Rin, but isn't sure if he should with the Takenaka siblings around. Then, he gets a thought.

"Before I show you kids your way to class, there is something I'd like to go over with you." he speaks jumping down from the lamppost.

Seiya asks using an expectant type of tone, "Okay, what did my brother do now?"

Mephisto replies, "Oh don't worry, you're brother isn't in any trouble. It's actually more concerning the three of you."

"The three of us?" Rin asks.

Not really wanting to explain, Mephisto has no choice and goes on, "Yes. The three of you need to understand something about each other that you three only must keep to yourselves. No one else is to know."

Seiya thinks, "{I knew it! Something's up with Rin.}"

"Seiya, Kenta…Rin is really the son of Satan." Mephisto explains.

"Whoa, no way!" Kenta says in disbelief.

"Aha, I knew something was going on! I could sense it right away!" Seiya boasts.

Rin explains, "But see here's the thing: I only had one father, and his name was Shiro Fujimoto. Satan is not my father, not in any shape or form. I plan on kicking his ass by becoming an Exorcist!"

"Well put, my boy." Mephisto says.

Seiya is left a bit dumbfounded; the son of Satan working against him? Sounds too good to be true. However, Kenta has full respect for Rin, sensing some kind of pain behind his words. The blonde demon places a hand on Rin's shoulder.

"Thanks man." Rin says doing the same. Quickly after he asks, "So what's up with you guys then?"

"They're quite a case." Mephisto says. "You see Rin, about five years ago, their demonic father's true nature kicked in and turned their mother against them. While Seiya was unaware, Kenta could sense the trouble and sadly killed both their parents trying to protect her. However during the fight, he accidentally left a single scar on both of her hands. Like you Rin, Kenta is a demon's spawn, but nowhere near your power. Seiya in a way absorbed her brother's abilities, and the both of them have their own pyro-based abilities."

Seiya tries to hide her hands by folding her arms and Kenta only slightly hangs his head. The headmaster goes on to say that his powers were eventually sealed with a sword that Seiya created with a few other Exorcists, so now he is in control, unless it comes in contact with his blood. Rin isn't sure what to make of this information, but is able to understand their pain; he still feels responsible for what happened to Fujimoto.

"I don't care if you guys are demons or not." Rin says breaking the silence and gaining the siblings' attention. "As long as you guys want to be Exorcists too, then I'll be right there beside you."

Seiya's eyes widen astonished. Kenta practically glomps Rin happy to know that not only does he have a new friend, but also an ally. His sister is not sure what to make of Rin's words, and wonders if she can actually trust him. Memories of coming to her brother's aid flash in her mind, people yelling at him or calling him a "demon's child" under their breaths…she's always had to defend him or stop him from hurting anyone in a fight. She couldn't trust anyone but her brother and mother growing up, so she thinks how she could bring herself to trust the spawn of Satan. However, Seiya quickly thinks back to the moment Mephisto appeared. That night, he saved the siblings from a terrible outcome and bringing them to True Cross Academy, earning her trust.

As Kenta continues to show Rin his affection, much to Rin's displeasure, Seiya thinks to herself, "Can…can I really trust him?"

Mephisto places his hand on her shoulder from behind, causing her to turn and look up at him. He assures, "Relax Seiya. You can trust Rin. I highly doubt he'd hurt you or your brother like others have in the past."

Kenta then remembers, "Oh yeah, Mephisto, where's our Exorcist class?"

"Ah yes, I almost forgot! Just follow me." Mephisto replies. "However boys, just one thing. You two can say whatever you want about your ears, fangs, and tails, but those flames are a no-no. The both of you be careful and control your tempers."

"Got it." they reply.

He walks over to the cement wall, and jumps over it causing the trio to rush after him. However, there is ground below, and he instructs for one of them to open the metal double doors in the side of the wall. All three jump down one by one, and Kenta is the one to use his key. He opens the doors and inside is another large hallway, almost looking like stained glass. The key has indeed successfully warped them to the cram school.

Mephisto takes the lead bringing them to their class. Once it sinks in that the three of them will be classmates, Kenta nearly celebrates the thought, leaving Seiya to become cautious. Once at the door, the headmaster states that he'd be sitting in with them today, at least sitting in with Rin, possibly to make sure things go okay. Once again, he transforms into a dog and surprises the boys with the fact he can talk. He questions the trio if they really want to be Exorcists, and to be sure of themselves before they open the door.

Seiya becomes the bold one and is first to enter the classroom. Several other students have already arrived, noticing one in a cloak, one that looks like a typical punk sitting with a short bald boy and another with pink hair. She spots a girl who looks like her attitude is already activated and shows zero intimidation. Seiya introduces herself as she walks in and seats herself in the middle. Kenta happily follows suit, introducing himself before sitting next to his sister with a big grin on his face. Rin forgets his nervousness and tries to boldly walk in and introduce himself. Mephisto follows Rin and sits next to him in the front.

Kenta giggles and says excitedly, "This is so awesome! The three of us get to be in the same class! I wonder what our instructor will be like?"

"{I'm guessing something close to the uptight, strict assholes we dealt with.} As long as they're nice, I don't care." Seiya says.

Rin questions who all the other people are, to which Mephisto quietly replies that they're here to become Exorcists just like he is. Kenta, full of boundless energy scans the class over from his seat, wondering who he could befriend next. Seiya calmly rests her head on her arms a bit tired from walking around the large campus. Just then the door opens, and everyone's attention is now focused on the front. Rin and Kenta become stunned to see who the instructor is. Another boy, dressed in a long black coat, looks to be the same age Rin. His hair is short and brown, has three moles on his face, and wears glasses.

He speaks with a gentle, friendly tone, "Good afternoon everyone. My name is Yukio Okumura, and I'm your instructor for the Anti-Demon Pharmacology class."

Rin stands in total disbelief trying to ask Yukio what is going on. Although it appears that Yukio ignores his questioning, he goes on to give a brief history, stating that he started his training when he was seven, and has now become an instructor. Once more Rin starts demanding an explanation, but his twin continues to ignore him, this time a bit more coldly. Seiya starts to sense trouble, Rin's aura filling with anger. When Rin finally marches up to Yukio and angrily demands they talk now, Yukio asks the class to wait in the hallway. The Takenaka Siblings are last to leave.

Out in the hallway, Seiya begins to shiver. Regardless, she can sense Rin's angered aura. But then another one intrudes confusing her. Looking at the door, she secretly activates an ability she developed over time, changing her vision. The world around her becomes black and white, with any object being outlined in white; this is her Aura Sight Ability. Humans are highlighted in a greenish aura, while demons are highlighted in red. However, since Rin's flames are blue, that is the color of his aura. From what she can see it viciously dances around. But she can see Yukio's aura as well, but it isn't fully green. It is mixed with both red and green, causing her mind to go numb in confusion.

"{…Y-Yukio's…both a human AND a demon? Ugh, it just barely matches up with Rin's aura. Sure they're twins, anyone can see that…and I've heard of him from Mr. Faust…but he never mentioned he was both a human and demon hybrid. Just what's going on?!}" Seiya theorizes.

She watches the auras move around as Goblins suddenly intrude on their confrontation. She sees something was knocked over, a vial; it was the one Yukio only briefly brought up indicating its role as an attractant for demons. Rin and Yukio continue their argument as the young twin fends off most of the goblins. Eventually, Rin draws his sword and charges at his brother, until Seiya sees he was aiming for the Goblin right behind him. Everything stops. Their auras begin to calm down…whatever confrontation occurred seems to have ended.

Seiya deactivates her ability, shaking her head in the process. Her regular vision returns. Kenta asks his sister what she saw, knowing for a fact she wasn't just staring at the door. She has no clue how to explain it, but she plans on confronting Mephisto later about it.

Later that day, the Takenaka siblings discover their dorm. To their surprise, Yukio approaches the building as well.

"Oh hey Mr. Okumura." Seiya greets.

Yukio smiles saying with a slight chuckle, "You can call me by name outside of class, Seiya. It's alright."

Kenta's excitement builds as he says in a hyper fashion, "Whoa too cool! We're sharing the same dorm as the Class Rep who's also our teacher! Too cool!"

"Wow you are just full of energy, aren't you Kenta?" Yukio asks a bit thrown off.

Seiya jokes petting her brother on the head, "It's a disease." She then asks, "Anyway, would you know why we're in this dorm?"

"I sure do." Yukio replies. "Although it was more planned that it would be just me and my brother, mostly because he is dangerous, Mr. Faust told me about you two before exorcist class. Although you two aren't as much of a threat, he feels taking a precaution and placing you two in here would be beneficial. This way, should Kenta become upset and his demonic energy ends up leaking, no one but us would sense it. Mr. Faust doesn't want anyone to fear either of you."

"You telling me he actually thought ahead?" Seiya says in a more sarcastic tone, "Quick, someone call the hospital, Mr. Faust found his brain!"

Kenta just gives her a look saying, "Don't you think you're being a bit harsh, sis? What if he's nearby and hears you?"

"Oh he's already fully aware of my attitude, bro." she responds, "He knows I don't screw around."

Yukio then jokes, "Hmm, a hyper-active live wire and a sarcastic fireball; this ought to be very interesting."