Shego used to be a superheroine alongside her brothers as part of Team Go. All of them were hit by a mysterious rainbow "comet" when they were younger which instilled in each a color-coded glowing superpower; Shego's is green. The properties of her power are never fully defined but have been seen to stun, burn, melt, cut through the strongest metals (including alien constructions), and can deliver concussive force. Normally Shego expresses her glow enshrouding her hands and fingers, but she can also range it as a beam (distance unknown), as well as concentrate and toss it like a ball of chi or ball lightning. Despite the properties of her ability, Shego has a tendency to drop or dial it back during key moments of close quarter combat with Kim which would otherwise injure the girl. However, after heavy usage Shego will begin to tire. According to her brother Hego, Shego left their group because the more evil they fought, the more Shego liked the evil and became a villainess. According to Shego, she quit because her brothers were intolerably annoying, a claim that even Hego would later imply to be true, since Shego was responsible for keeping the team focused back then. In the episode "A Sitch in Time" Shego's older self is shown wearing different clothing than her present self. In the PS2 game "What's the Switch?" many of Shego's other clothes are shown including the purple jacket from "Emotion Sickness", her future outfit from "A Sitch in Time", and a battlesuit of a similar design to Kim's.