Y/N is a little. Dabi and Todoroki are villains who've been watching her for a while, because of her quirk. Her quirk is 'Nyctophobia.' If she touches someone, she can make a cloud of darkness around them and cause them to have hallucinations of their worst fear. After she uses her quirk on somebody, they normally become afraid of the dark. This is why her quirk is called 'Nyctophobia.'