Your Bakugo's 3 year old little sister, he's not aggressive to you at all, he's crazy protective over you. Today principle Nezu announced 'Bring your sibling to school day' everyone who had siblings would bring them. And Aizawa brought Eri in, Nezu said it was okay. everyone started arriving at class with all there siblings, like Denki with his 3 younger sisters, Tsu with her younger siblings, and others, but some like Izuku were only childs so they didn't bring any one. But then Bakugo bust into the room holding a little girl, about 3, she had blonde hair, red eyes, and was wearing a onesie based off of Bakugo's hero costume design