Sennit was created by a mad genius named Beverly, and he was intially created to cause destruction and chaos, but he disobeyed. When he did, Beverly shocked him for 15 minutes every time, and she also tortured him and mocked him.

Beverly mistreated Sennit, locking him in a steel cage that he couldn't escape from, and starving him until he obeyed, but he never did. In the end, Beverly decided to leave Sennit, who was really small at this time, out in the wilderness to fend for himself. He didn't know what to do so he wandered and was brutally wounded by the hostile animals there.

Fortunately someone found him, a ten tails named Celia took him in and cared for him, although he had major trust issues so he was hesitant at first. Celia is now considered his adoptive mother, and Beverly has found out he's alive and is looking for him.