You are the little sister of some sharks (18-year-old killer, 18-year-old horror, 19-year-old dust, 18-year-old Cross, 19-year-old error and 19-year-old nightmare) All of them, in addition to being your older brothers, All of them are half shark half human, you are their younger sister a 15 year old half human mermaid, all of you live in the sea with other half human fish