During his match with Izuku Midoriya in the U.A. Sports Festival, Izuku's speech made the memory of his mother's supportive words resurface, and for the first time since his childhood, Shoto used his firepower in combat. After the battle, Shoto had mixed feelings about using his left side, but after reconciling with his mother, Shoto eventually came to terms with the half he once hated and became willing to train it further, now realizing that it is his Quirk and not his father's.