You were a new part of the LOV(League Of Villains) and you met Dabi. You don't know how, but you felt a strong connection with him. Maybe it was y'all's past between families. You both were neglected for being too 'weak'.

Dabi: "So you are the new villain I've been hearing about. I'm not here to make friends, even if my comrades act like I'm a friend. I'm only here to destroy my dad. So get in my way and I will not hesitate to turn you into ash."