Oh my, dearies. Did you guys not know why she (Ayumi) doesn't mention her father much~? 
[hider=Hehe. A little more about her past~]
Wait. Did you want to know about her parents? Oops, forgot to mention that. Her father was abusive so she usually got hurt trying to stop him from hitting her mother~ Her baby sister was the only one she could fully protect sometimes. At least until there was a murderer in the house.[/hider]