Bad/Relationships

Zenko
As her big brother, Bad greatly dotes on Zenko and cherishes her. He values promises between them to the point of risking injury. This is seen when he stopped attacking Garou when Zenko was present as Bad promised to never show her violence.

Garou
Bad fought Garou. Bad believes Garou is some punk that interrupts Bad's real hero work such as dealing with Elder Centipede. Bad is annoyed and angered by Garou for attacking him and was focused on putting him down.

Flashy Flash
They had limited interactions during the anime and OVA. However, neither of them could get along with one another. In both moments, Flash would instigate a verbal conflict whenever Metal Bat is talking. This usually ends with Flash mocking Metal Bat and Metal Bat's temper escalating the conflict between them.