Bakugo is your big brother, you and him used to have a close bond until you both got lost into the apocalypse.. you were only five years old at that time and Katsuki was sixteen.

that was Six years ago

You we’re walking around the abandoned streets of Japan, as you caught glimpse of a blonde twenty three year old man, it was bakugo.. as bakugo caught a glimpse of you, as he held his breath in disbelief as he started to run towards where he thought he saw you, “LITTLE SIS!”