Elephant

The name is the description. He takes the form of an elephant, distinguished chiefly by enormous size and by the collar fastened around him.

Trigger and the Villain Factory's experiments have left him savage, lashing out at anyone who enters his line of sight. Whatever he was like before any of that was done to him is unknown.

Fat Gum, Eraser Head and Monika Kaniyashiki storm the Onomura Pharma Corp. offices with the police at their backs, and inside they find a darkened laboratory lined with giant incubators. Two chambers split open, releasing the Elephant and Panda. Eraser Head had flagged this exact possibility beforehand, knowing abducted villains tend to come out swinging, and he and Fat Gum dispose of the pair quickly. Bombers then tear free of the remaining tanks, so Eraser Head shuts down every Quirk in the room at once, only for Number 6 to tap an app on his phone and blow the upper section of the facility apart.

What became of Panda and the Elephant is never confirmed, but since the blast left Eraser Head and his team standing, both villains presumably survived it too, and were most likely hauled in for study or kept somewhere until they settled. His unnamed Elephant Quirk gives him the shape of an elephant and, it is assumed, the animal's capabilities; because Trigger was used on him throughout, how it behaves under normal circumstances remains unclear.