Some quick answers to a question you guys keep asking.
Why the rewrite?: Because I wanted to. I wasn't satisfied with how the story of the original was going and how I was utilizing and introducing the OCs, especially Sire. So, I decided to rewrite the story to (hopefully) make it better.
"S-save myself?" Izuku asked as he followed behind the cloaked figure, noticing how he stayed to the shadows as best he could, "But how? You're already teaching me how to fight, so what else is there?"
"Fighting will only get you so far," Sire hummed as they walked through the alleyways towards his apartment, "Especially against a foe like that. No, I am going to teach you something else."
"What?"
"The Influence," the man replied as they entered the building, holding the door open for Izuku as the teen hurried inside.
"The…Influence?" Izuku muttered as they made their way up the stairs, "Is that…is that the thing where your voice goes weird and people do as you say?"
"Yes," Sire nodded as he pulled out his keys, the two entering his dimly lit apartment, "It is an innate talent of our kind. At least, I believe it to be so."
"W-what does that mean?" Izuku asked slowly, sitting in his usual place of the sofa across from the wingback chair, his Sire taking a seat in it.
"We do not truly know how much of my power has transferred to you, young one," Sire hummed, "So we cannot be sure of how much you are capable of."
"W-wait, transferred to me? What do you mean transferred to me? I know you…you Turned me, but didn't that just make me stronger?"
"Ah, how foolish of me," Sire said, "I do believe I never told you of how you were Turned, did I?"
"You…no, you didn't, really," Izuku said, shaking his head.
"After I had fed upon you, I came to my senses," the man answered slowly, as if picking his words carefully, "I was, for lack of a better word, appalled, at what I had done. In a panic, I fed you some of my own blood. I believe this is what caused your Turning."
"You…fed me some of your blood?" Izuku gagged as he spoke, "That's disgusting!"
"And I apologise for having done so," Sire bowed his head as he spoke, "But I could not allow you to die there."
"But then why did you attack me in the first place?" Izuku asked, "You seem so…in control now. What happened to make you like that?"
"I would rather not say," Sire replied, shaking his head, "At least, not yet. However, I intend to take full, for lack of a better word, responsibility, for my actions. As such, I am training you."
"Oh," Izuku replied, noticing the sad look in his Sire's eyes, "Well then, uhm…should we start on teaching me how to use the Influence?"
"An excellent idea," Sire hummed happily, "Now, first, you must relax your mind, imagine yourself in a clear space and listen to my voice…"
"Izuku."
The teen looked up at his name, blinking slightly as he saw his mom standing in the doorway to his room.
"Yeah, mom?" he asked, swallowing slightly as he saw the worried look on her face.
"I was just wondering," she started, taking a deep breath to calm herself down, "You've been out quite a lot lately, and until quite late as well. I know you're still on top of all your classes and homework but…I worry."
"Oh," Izuku muttered, looking down at his feet, "I'm sorry."
"You don't have to be sorry, sweety," Inko hummed as she stepped into the room, walking over to him, and taking his hand to squeeze it, "I just want to know what you're doing."
"I'm…" Izuku hesitated, wondering if he should really tell his mom the whole truth, but he wasn't sure how she'd be able to take it, "I'm training. For UA."
"Oh!" Inko gasped, releasing his hand and stepping back in surprise, making him flinch, "Oh. Is that what it is?"
"It's okay mom," Izuku said hurriedly, "I…I have a quirk now! And I'm learning how to use it!"
"You're…learning how to use it?" she asked.
"Uhm…yeah! I, uhm…I found someone with a really similar quirk to mine, and they're helping me!" Izuku blurted, immediately regretting it as the woman gave him a suddenly overjoyed look.
"You've made a friend?" she gasped, "Oh, sweety, that's great!"
"M-more of a trainer, really," Izuku mumbled, looking away.
"Well, friend or trainer, you simply must invite them over for dinner!" Inko said, her tone shifting to a more stern one, "I just want to make sure that you're being safe, Izuku."
"I…I can ask," Izuku replied as he turned back to his homework, mentally kicking himself as he did.
"Rest now, young one," Sire said as he handed Izuku a glass, "You have been making good progress."
"Have I really, though?" Izuku sighed, "It's just…I don't feel anything! All the sensations you describe about using Influence, a dominance over the mind, a sense of control! I don't feel any of that!"
"Well," the man hummed, "You are testing your abilities on me, a much older and more powerful being. It stands to reason that you would have, for lack of a better word, difficulties."
"It's just…how do I even know it's working?" Izuku sighed.
"Believe in yourself," Sire answered, "I know it may be difficult, but you truly are getting stronger. Both in skill and body."
"Thank you, Sire," Izuku sighed, "I'll keep that in mind."
"Good, now, is there anything else you'd like to talk about?" the man said, "How is school? Have you been keeping up with your work?"
"I have," Izuku nodded, biting his lip nervously, "And there's one other thing…"
Sire nodded as the teen continued.
"It's just…well, it's about my mom…"
Izuku didn't know whether to be excited or worried. Tonight was the night. The night his Sire would officially meet his mother under the guise of being his trainer. Which he kind of was anyway, so it wasn't exactly a lie. But it wasn't the whole truth. Oh no, what if his mom figured out the connection? What if she realised the one who'd originally attacked him was his Sire? Would she call the police? Would she want him to stop learning from him?
"Oi, Deku," the voice growled behind him, pulling him out of his mumbling, "Where the fuck do you think you're going?"
"H-home?" Izuku squeaked as he pressed himself against the wall of the alley he'd been walking through, Bakugo and his cronies surrounding him.
"Yeah fucking right," the blond spat, flecks of spit hitting Izuku in the face, "Who the fuck was that guy from before? Huh? The fucker that said he'd report me?"
"H-he's no one!" Izuku muttered, "Uhm…he was just a concerned stranger!"
"Bullshit!" Bakugo growled, slamming his hand into the bricks just beside Izuku's head, smoke rising from his palm as he let off a crackle of explosions, "He talked like he knew you! So, who is he?!"
"No one!" Izuku repeated, "I swear Kacchan! I don't know who he is!"
The fist slammed into his stomach, a small explosion doubling the force as he curled over, coughing violently as the hand grabbed the back of his neck, yanking him up and slamming him face first into the wall.
"Talk, you shitnerd!" Bakugo shouted, "Talk, or I'll give you worse than a few scars this time!"
"Kacchan!" Izuku was panicking, he could feel his heart beating rapidly in his chest, his instincts on fire as he fought against the urge to try attack the other boy. What had his Sire taught him? Keep calm, look inside, imagine yourself like a dam, letting the power out in small manageable bursts. Suddenly, a wave of calm washed over his mind, flowing through him as it poured out of his throat, "Stop."
The blonde's sneer suddenly vanished, his eyes going blank as he released the back of Izuku's neck, stepping away. The green-haired teen gasped as the blood inside him boiled, leaving him feeling dizzy and disorientated. He looked up at the group of students that had gathered to beat him up, all standing there with blank looks on their faces as they stared ahead. Grabbing anything he'd dropped, Izuku ran from the alleyway as fast as he could.
"Izuku sweety, is that you?" Inko called as she heard the door burst open, furrowing her brow as she heard the loud panting, "Izuku, are you okay?"
She nearly shrieked as she left the lounge, staring at her son as he lay on the floor, his eyes wide open as he gasped and choked.
"Izuku! What's wrong?!"
"Blood," the voice from the hospital started to leak through, making Inko shiver as she hurried to the fridge, grabbing a full bottle of animal blood, and hurrying to her son's side.
"Here, sweety," she murmured, taking the lid off and pressing it to his lips, flinching slightly as he opened his mouth, grabbing hold of the bottle and sucking down its contents noisily, "Izuku, what happened?"
"Kacchan…" the name made Inko's blood run cold. What could the blond have possibly done to make her son end up like this? They'd been as careful as they could, making sure he had more than enough blood to avoid another "episode", as she had started to call it.
"What did…what did Katsuki do?"
Izuku froze, his wild eyes calmer now as he looked at his mother, sitting up as he wiped the blood off his lips with his sleeve, immediately apologising for doing so and offering to do the laundry.
"What did Katsuki do, Izuku?" Inko asked again, more sternly this time.
Izuku flinched, before muttering something.
"What?"
"Nothing," Izuku repeated slightly louder, "He…he didn't do anything. It was my fault. I…I used the Influence on him and a bunch of other people. It used up almost all my blood."
"The…Influence?" Inko asked, staring at him in confusion, "Izuku, what are you talking about?"
"Oh," the teen gasped, looking at her in shock, "I uhm…I never told you, I figured out another ability I have. Si- My trainer calls it Influence."
"Another ability?" Inko gasped, "Of your quirk? Izuku, you didn't hurt them, did you?"
"NO!" the boy almost shouted, "I swear! I just made them leave me alone! That's all! I swear mom! I swear!"
"It's okay," Inko said comfortingly as she patted him on the back, "I believe you. Now, go get washed up before our guest arrives, would you, I need to clean up this mess you've made."
"Oh," Izuku said, looking down at the drops of blood that had spilled out of his mouth while he was drinking, "I'm sorry."
"Just go bath, sweety," Inko hummed as she headed to the kitchen to get some cleaning supplies.
"Come in, come in!" Inko said to the tall, cloaked figure as he stepped over the threshold of the apartment, doffing his cloak to hang it on the coat rack attached to the wall.
"It is a pleasure to meet you, Madam," the man said as he bowed low, taking her hand to gently kiss her fingers, making Inko blush slightly, "Your son speaks nothing but praise of you."
"Oh, t-thank you!" Inko replied, slightly taken aback by the man as he stood to his full height.
"Mom!" Izuku called as he hurried out of the kitchen, "I'm done setting the table is…oh, Sire! You're here!"
"Sire?" Inko blinked as she looked between the two men, Izuku freezing as the other man simply smiled.
"That would be my name, of sorts," the man hummed, "Feel free to call me by it if you so wish."
"Oh, well then, Sire-san," Inko said, "Welcome."
"Izuku," Inko said as they sat at the table after they'd finished eating, "Could you put our bowls in the sink and go to your room for a moment."
"Mom?" Izuku blinked, looking at her in surprise, "Uhm…is that okay? Are you su-."
"Izuku," she said sternly, "I would like to talk to your trainer privately for a moment, could you please go to your room."
"Yes mom!" the boy answered, quickly picking up their plates and depositing them in the sink, before hurrying out of the room. Inko remained silent until she heard the door to his room close.
"Now then, Sire-san," Inko sighed, "The first thing I want to ask you is how you met my son?"
"By happenstance," the man replied, "He attempted to help me, and I…did not return the favour."
"What does that mean?" Inko asked slowly, staring into the man's ever shifting eyes.
"I…I do not know if it is safe to tell you as of yet, Mada-."
"Don't you "madam" me," Inko said flatly, making the man start as the anger was clear in her voice, "How did you meet my son?"
"I…I am the one who Turned him," Sire replied.
"What?"
"The reason for your son's, for lack of a better word, changes, are due to the man seated in front of you," Sire explained, getting up from the table before bowing deeply, "I apologise greatly for my actions."
"You…but…how?" Inko gasped.
"My quirk," the man said, "It is called Vampire, after the age-old legend. I have all the powers of a Vampire, as well as the weaknesses. It seems that I also to have the ability to pass on my power to others, though at great cost."
"Great cost?" Inko blinked, not sure if she wanted the answer to her next question, "What cost?"