X-5 is the third member, and robot of Atomic Betty's crew, and is a roughly rectangular headed, bright yellow colored, hovering robot with blue eyes, with red pinchers for hands, who takes the role of both the navigator for the Starcruiser and providing any unknown information that they may need for their mission. Due to being a robot, he tends to sometimes spout too much information at inopportune times and is exceptionally pedantic, which usually gets on his fellow crew member Sparky's nerves.