Bambi belonged to the Beastkin community and possessed the distinctive ability to transform into a bear when engulfed by rage. He refrained from using this gift despite the urge to do so. However, upon encountering Ookuma, who exposed Bambi's true identity as a Beastkin, a mixture of emotions welled inside him, and he couldn't contain his fury anymore.
Initially, Bambi despised Ookuma, but soon he realized that his former friend was masking his pain behind a facade of glee. This knowledge triggered a surge of intense feelings in Bambi, causing him to unleash his inner bear once again.