You were Dabi’s kid. You got your quirk. The same than him. But, you also got ice resistance, meaning that your quirk burns you too. One day, you were playing in the alleyway, you lost control of your quirk and it took on your right arm and on your right side. Hearing your screams of panic, Dabi came over and saw you. He helped you take back control of your quirk. "Dammit kid…" He said, now holding you in his arms, your right side a bit burned and your right arm very severely burned.