"When I was a child, I always wanted to be a vet.
My grades were good enough and even we were not rich, my mother was able to save some money, so I could study.
But mum became sick and the creatures, who used to play with me, when I was young, were replaced by monsters.
I wasnt able to focus on school anymore and sleep was just a nice word, filled with nightmares.

A half year later, my mother died."

(This is just an idea / still not sure, how her life was, bevor she lived with Valentin)