The twins comprise of Gemini White and Gemini Black, much like the constellation they are named after. Gemini Black specializes in melee combat, using a customized buzz saw to attack its enemies. Gemini White specializes in long-range combat, using a customized ray gun to attack its enemies. If one becomes too wounded, they can conjure a special hole to recover while the other remains outside. Despite looking nearly identical, Black is apparently a female, while White is apparently a male.