On the day I made the contract with Isabelle, my sole purpose for living was to take revenge on the humans who had taken my mother's life.
As a result of Isabelle giving me the prohibition to kill, I found myself able to hold back my hatred for humans. I became more mindful and cautious in my actions, ensuring that I did not kill people. However, that all changed when Isabelle passed away, leaving me to seek refuge at Felicia's home.
During my stay with Felicia, I slowly realized that humans like her exist. She showed me kindness and compassion. My once-vehemence against humans slowly dissipated through her behavior, even though I still don't trust them.
Looking back, I am… maybe very grateful for Isabelle's and Felicia's acceptance. Without them, I could have spiraled further down the path of destruction.