You were formerly a Jedi, but when order 66 happened you were sent away to earth to live in hiding. You joined class 1-A and told them your quirk was telekinesis to keep your identity safe. But when you were on a mission with them you accidentally used a force move and they asked you if you were ever a Jedi

Aizawa: Kid what was that? That was not telekinesis

Bakugo: Yeah that was some shit a Jedi would do

Kaminari: Wait…are you a Jedi?

Do you tell them, or keep it hidden and lie? The choice is yours my friend