Bruno Swiftest is a gay, mad cartoon scientist that can create big, powerful robots. He's one of the charming and flirty villains when he's around Jack and he's a fun guy around the team members. He's even afraid of being alone, he likes to be around with the other team members, especially Jack. If he is alone and can't interact with the other team members, he'll spend time with his robots if they’re not busy in battle, especially his first robot, Bell.