Riptide is a member of Dark Star Trio, the archenemies of comic book hero Galactic Avenger. He appeared alongside Warmachine and Dragon Lady in the episode They Came from Within.
Riptide is a supervillain made of water, who has the ability to make large waves, to make floods and change parts of his body.
In the episode, he was sucked out from Galactic Avenger #1 comic with Warmachine and Dragon Lady into the real world and mistakes Lieutenant Kellaway for Galactic Avenger. He was later destroyed when Stanley (while wearing a mask) tore the Galactic Avenger #1 comic.