Aldous Berkley Mutant Type: Feral (Canine)
First Appearance: "Whiter Shade of Pale"
Quote: Mason: Does the daughter have stealth capabilities? Aldous: It's possible. We didn't see her. Heh-heh.
Details: Aldous was a not-too-bright GSA informant who aspired to become a real GS agent. He promised Mason Eckhart that he would capture Mason's ex-lover, Danielle Hartman, and her daughter Catherine. After Mutant X foiled Aldous's plans, Mason grew impatient with the GSA wannabe and poisoned him during a pasta dinner.
(Source for that entry at First Mutant's site:From My Friend's Bookstore's list of GS agents: Berkley, Aldous. Feral (canine). DECEASED.)
*very personal note from me: Personally I think Aldous is more a feral feline than a feral canine. There are some points that let me think that.*