"...we both want the same thing." "Which is?" "A distraction."

This is the rewritten version of the first Insomnia. Plot is similar, but has major changes, and hopefully better. -•- [Y/N] [L/N], sleep-deprived and immune to quirks, is not a hero. In fact, they have a close relationship with villains. Shota Aizawa, sleep-deprived and erases quirks, works as an underground hero and teacher. -•- Spoilers until season 3, episode 14 (episode 52 overall) / chapter 100. No spoilers on season 4 and beyond.

You're the new teaching assistant at UA for class 1-A. Your main focus is to help students control their quirks and to teach those who are will hand on hand combat. They're all curious about you, who you are, what you can do. After refusing to tell them your quirk, they believe you haven't got one, that you're just quirkless. But Aizawa is suspicious of you, he's sure you're hiding something. Something about you just draws the emotionless man's attention. He wasn't wrong, you were hiding something. Will all go well for you? Will they find out who you really are? Your secret? Would they accept you if they found out? Oh, and your secret? You're the older sister half sister to Rin and Yukio Okumura. The parent the three of you share? Your biological father, Satan himself