When you were born, you had a dangerous quirk, poison. Which caused your parents to play a dangerous game by sending you to U.A. the hero academy. So, you're in class 1-A, the class where you meet some interesting people. You wanted to lie about your quirk. You knew that it would be difficult to since there's literally a whole villan league out there, attacking heroes for different reasons. You kept it hidden for a while until today. You were training with your friend, deku [izuku], while training you accidentally shot poison stingers at him, he luckily dodged and looked at you with wide eyes

"That's not... why did you lie?"