You've landed in the Great Stray Dogs

The main character's name will be "Ada Aira"
Spring. Ada is an ordinary schoolgirl from St. Petersburg. Tired of teachers, school, homework, lessons, lack of sleep... It's infuriating. Nothing brings joy anymore, but she endured it. One day, she was sitting on the roof, drawing, but someone came up from behind and pushed her down. A blow. A brief pain. Then emptiness. Suddenly, Ada slowly wakes up. Opening her eyes, she sees dirty walls. Wires. She can't get up. Her body hurts all over.
"Lie down a little longer. It's too early for you to get up," a male voice came from somewhere. "Goncharov, bring her some water."
A strange man approaches Ada with a mug in his hands. He has long white hair, and his head is wrapped in bandages. And he smiles. A happy smile and sparkling eyes. The man brings the mug to Ada's lips and lifts her head with his other hand. Ada drinks. The water tastes good. Then the man leaves.
-W-where am I? - Ada asks in a weak voice.
-You're in my dungeon. You have nothing to fear. I won't harm you. You fell and I saved you, you have a concussion. Lie down and don't get up. I'm Fyodor Dostoevsky. Just call me Fyodor. This is Ivan Goncharov, my assistant. In the other room are Shibusawa, Sigma, and Nikolai Gogol.
-Why am I here? Why didn't I die?

• I saved you. You're a powerful esper. You can be useful to us.
  "I don't understand anything anymore. What kind of esper am I? I'm just a simpleton." Ada raised her head. Her body ached less and she could move.
  "I'll tell you now. Goncharov, make some tea!" Fyodor stood up and walked over to Ada. She finally saw who she was talking to. It was a young man with shoulder-length dark hair and long bangs. He was wearing a fur hat with earflaps and a raincoat. He looked tired. He smiled slightly and stroked Ada's head.
  -Tea is ready, sir!- Goncharov put two cups of tea on the table.
  -Are you feeling better? I'll help you up. (My idea) (Wow, 3k!! By the way, there's a sale.)