her name Naga and she has a pet snake named Shadow

Naga is the UA traitor, and she secretly has feeling for Kurogiri from the league

you can be Ochako Uraraka, Tsuyu Asui, Kyoka Jiro, Nejire Hado, Itsuka Kendo, Izuku Midoriya, Katsuki Bakugo, Shota Todoroki, or Netio Monona

(Naga is from class 1-A btw)