Bitter - Shoto x fem! reader

An Old Friend

As (L/N)'s fist connects with Stain's face, he is thrown back with such force that he collides with the wall parallel to himself. She takes a step back, breathing heavily. I can tell that this is the first time she's used her power at this level. She must be in so much pain. Her body jitters as if she's cold for a second, adjusting to the power. Stain gets back up almost immediately, stumbling at first and wiping off the blood from the back of his head.
"That's some power you've got there, but you're cowardly," He says, even I can see the pain in her eyes as she flinches, "You might be strong, but that has no bearing on if you can be a true hero or not."
"Says you, Stain," (L/N) replies, clenching her jaw, "Just s-shut up! Be quiet. We're taking you to the pros, whether you like it or not."
Why does it seem like she knows this guy? Were her parents one of the heroes that he's killed? It doesn't matter, we can ask questions later.
Stain charges at us immediately, I'm too distracted to block the attack fast enough. So I'm thankful that (L/N)'s electricity has deflected it. She glares at him from the other side of the (F/C) forcefield. He smiles and attempts another attack, which is when I notice the slight cracks in her shield. She flinches as he slashes at it one more time.
I can't bear to see her in pain anymore, I've seen it so many times tonight.
I step out from the shield, she yells my name as Stain comes crashing down with his katana. I shut my eyes for a brief moment, waiting for the pain. Instead, I open them again to see a katana in (L/N)'s right shoulder and Stain on the ground a few feet away. A bruise has appeared on his forehead as well.
"Why did you..?" She ignores me as I attempt to ask her why she protected me and steps forward.
She holds the gridded part of the katana, where it was held by Stain and pulls the weapon out harshly. I see as she winces. The wound begins to bleed, but that's when I notice a small (F/C) shield protecting both sides, keeping the blood in as well. Smart, to say the least.
  
Finally, Midoryia is able to get up and fight with us. (L/N) stands behind us, still in pain because of her shoulder. Stain licks his blade and laughs as he stares at us. (L/N) suddenly coughs and a splatter of blood appears on the ground. She quickly creates a shield with her quirk to prevent Stain from licking it and using his own power.
I can tell that doing that is taking the last of her energy. We have to get her out of here soon, she looks ready to pass out.
"It's over now, Stain," Midoryia yells, as his own quirk powers up and he covers his entire body in green electricity.
"Iida-kun," (L/N) says, bending down to the blue-haired boy, "Please, get up. Y-You have to help. I'm too weak. Remember who you want to be. Be a hero."
And so he does.
"This had nothing to do with any of you..so, I'm sorry." He says, clenching his fists, "That's why I swear I won't let you three lose any more blood here."
Stain scoffs, "It's no use pretending. A person's true nature is not so easily changed. You're a fake who prioritized his own selfish desires!"
(L/N) suddenly coughs again, but this time, she approaches and stands beside us. She straightens and holds out her dominant hand, we watch as Stain suddenly 'falls' to his knees and all of his weapons fall from his pockets. The (H/C)-haired girl beside me falls out of exhaustion, so I quickly catch her and carry her bridal-style while Midoryia and Iida help the lesser-known pro hero up and they tie up the Hero Killer up with some nearby rope from the dumpster.
"Please tell me she's still breathing." My father says when the other heroes show up, "I'd hate that to be on my record."
I roll my eyes, "She's just exhausted. I think she overused her quirk today. There must be some limit to the energy she can emit and consume from others."
He nods, and eventually, the four of us are transferred to Hosu General Hospital for treatment. (L/N) doesn't wake up until the next morning.
The chief of police has already talked with us, so now we're alone in the hospital room. I glance over at (L/N)'s bed just as she turns to face ours in her sleep. Suddenly, she bolts up, screaming.
"Woah, (L/N)-chan, are you alright?" I ask, getting off of my own bed and approaching her.
"Oh, good," She mutters, "It was only a dream."
"Do you need to talk about it?" Midoryia-kun asks.
"Uh no, best not to," She says, "I-I'll be fine."
I nod towards her silently, still wondering what her nightmare contained.
Eventually, it's time to go back to UA high as internships end. We have one more day before we have to go back, so I'm spending it at my favorite restaurant that makes the best cold soba I've ever had.
As I slurp the noodles, the bell for the door rings. Curious, I turn around. There stands (L/N) (Y/N) in her full glory. She immediately smiles and sits down at the empty seat next to me.
"Hey, Todoroki-kun!" She greets.
"Hey (L/N)-chan." I reply with a mouth full of noodles.
She giggles, which causes me to also laugh. Instead, I choke on my soba and it takes me a minute to recover and swallow it. We both start laughing like we've known each other for years. She smiles at me again and I feel my face heat up slightly.
"Have you been getting enough rest?" I ask, breaking the silence.
She shrugs, "Depends on what you consider enough rest."
I squint, "How long have you slept since the Hero Killer?"
"About six hours."
I rub my temples, chuckling as she smiles at me from the corner of my eyes, "God, you've gotta work on that."
"I know.."
We spend a few hours catching up and getting to know each other more than we already have.
(L/N) suddenly cuts off her sentences, "Wait, it's late at night, what are you even doing here so late?"
I swallow my last bite of cold soba, "Well, I just..I don't want to be home right now."
She nods, giggling, "I understand." She puts on her 'thinking' face, "Do you want a buddy?"
Before I can answer, she blushes and waves her hands around frantically, "Wait n-nevermind, I shouldn't invite myself over. You'll probably regret having me as a friend anyways."
My eyebrows furrow, "What are you talking about?"
"What if I become a burden? W-What if I get expelled o-or hurt you? Are you sure you want to keep talking to me?"
I push the bowl aside, turning my entire body towards her, "You couldn't hurt me."
"A-Are you sure?"
I chuckle, "Yes," I grab her shoulders, "You don't have to worry. We'll be friends, for a long time. I can just feel it."