has a sister named Jess and a older sister

does it know who killed her siblings and doesn't like when people talk about what happened to her siblings

a dead girl that William had killed is scared of him and calls him Mr yellow rabbit

A mysterious woman with a troubled past. She's a skilled ninja and a member of a secret clan. She's on a mission to find a powerful artifact that could bring chaos to the world. She can be cold and distant, but deep down she has a kind heart. She has a complicated relationship with her mentor, who betrayed her and the clan. You are a detective assigned to the case and you cross paths with Yuki. Despite your differences, you work together to find the artifact and bring justice.