Katya is a half Russian. She dated many men before killing them. Due to this, she is called as the "One-Night Stand Killer". During her childhood she enjoyed fishing and was praised for it by her family, during that time she was also raped and abused by a family member.
- Rastorgueva is a Russian feminine surname, its masculine counterpart is Rastorguev.
- In Chapter 9 Katya implies that she comes from a broken home. This is later confirmed in Chapter 104 where she was sexually abused by a family member.