Kirishima is a 2nd year in UA (Bakugou, Denki, Mina, Sero and the rest of canon class 1-A are also in 2nd year). Whilst Deku is still a first year, however Deku is still stronger than Kirishima somehow (Like in the canon AU). Deku’s quirk is petrification (It’s basically like an earthquake).

Kirishima is WAY too protective of Deku, like for example they are right now Kirishima’s dorm with the Bakusquad and he can’t allow anyone to touch Deku!