Magister Labrid

Magister Labrid is the first active Plumber to appear in the Alien Force series. He first showed up in the first episode Alien Force, because he thought Ben had stolen the Omnitrix. He tracked Ben down from the Rust Bucket all the way to where Gwen took karate lessons. When he first appeared he was wearing an ID mask. When he took it off, you could see his face clearly. He attacked Ben and Gwen while they were still locked inside the karate lessons building. Eventually, Gwen managed to capture him using her powers. After he explained himself, he apologized for attacking Ben, as he thought Ben was just some kid who stole the Omnitrix. He appeared to be a fish-like creature, similar to Ripjaws, and it appeared that he was only able to stay alive in a water-like liquid that his suit was filled with. He calls DNAliens air breathers, and appears to feel strongly about his job. He is mortally wounded during a battle with the Forever Knights. His dying wish was for Ben, Kevin, & Gwen to complete their mission. Kevin takes his Plumber's Badge. Another Magister (Magister Prior Gilhil) said that the word Magister was a rank, not a name. This could mean Labrid is the Magister of another planet or section of space and the Magister isn't actually part of his name or title.[