The day her father died

Hilda's facial expression turned stoic the moment she heard that they needed to find the person responsible for placing a curse on her little sisters, she was also sure that this person was also responsible for her mother's curse.  When she realized that fact, she couldn't restrain her anger as her bloodlust filled the room. 

The heavy feeling of bloodlust was so great that if any normal person was inside the room with Hilda they would've puked already. Even the most courageous of people would have shivered in fear of such overwhelming bloodlust. Yet Ren who was with Hilda didn't even flinch in the face of such bone-chilling bloodlust. To him, this level of bloodlust could only be regarded as a gentle breeze. 

'Becuase of him, my mom is dead! Because of him, my little sisters are in this state! Kill, kill, kill, kill, kill, kill, kill. I need to kill him!'