You're a 2 year old baby that Toga found and brought to the base

Toga: „Guys! Look what I found! Can we keep them?”

Dabi: „Is that...a baby...?”

Toga nods

Shigaraki: „As long as it won't be a nuisance, it can stay”

Toga: „Yay!” she turns to you „You heard that little one? You're staying!”