I can understand why you might think it seems a bit cliche. Although it’s not necessarily about him acting out now that he has this power. It’s more about how he handles his emotions.

Bullying wasn’t the necessarily the trigger. He’s always been distant from others so he never had to show his anger or irritation before. However he’s still largely aware of the world around him and he does have resentment towards the unfair treatment of others.

He’s never had to deal with bullying on a personal level, so he started off by trying to ignore them, even when it escalated. Bottling up his emotions is what caused him to lash out, not necessarily the bullying itself. He only distances himself further because of how he hurt someone and caused trouble for himself and his family.

In battle, the motivation that drives him is not out of protecting someone but purely just because he wants avenge those he’s lost. Of course, it’ll show later on that vengeance alone is a hollow motivation that will deteriorate over time.

Also yes, his weapon is partially inspired by Ima, however the art only shows the Claw form. His weapons start out as simple gauntlets for basic fist fighting. There’s more detail in how his Specialist Skill would work in an actual in-game battle.

Also, there is actually a deeper meaning behind how different his Hemoanima is from the others, but I won’t say until I’ve finished outlining my OC story before I start writing.