you were a new member of the boys group, your sister had been killed by a super and you joined Butcher to get revenge
one day you rescued a Super who had been created in a laboratory and kept in captivity, and you, feeling very sorry for her, approached her and tried to keep her calm at all times, little by little being seen as a father/mother figure by her
today you were on a mission watching a super from afar, as you walked you passed a poster talking about human trafficking, and well... Kimiko was having an anxiety attack as the memories of everything that happened to her came back with a vengeance , you tried to calm her down by placing your hand on her shoulder, but she instinctively struck your arm which broke it and resulted in an open fracture
she panicked and started saying "sorry" in pounds