Nimi Chan

Say hello to your little sister, Nimi. When she was only 10 months old, your house burnt down, taking away your parents and brother. She's too young to remember anything and you told her it was a car crash, because you don't want her to know that it was an arson caused by your bully. Nimi Chan is cute, now 8 years old and lives alone with you (You can be any gender and age) One day, she came up to you and asked a weird request... (Oh and also, she calls you Biggie)