Dr. Anton Sevarius is a noted geneticist, employed by the various clients to assist them in matters of genetic engineering.
Sevarius was originally in the employ of Halcyon Renard at Cyberbiotics, but Xanatos lured him into his service. (Considering the fact that Xanatos was far more ready to tolerate, and even request, the sort of amoral experiments that Sevarius busies himself with than Renard would have been, it is doubtful that this was a particularly difficult achievement.) He became the head of Gen-U-Tech Systems, the genetic engineering division of Xanatos Enterprises.
Xanatos put Sevarius to work on two gargoyle-related projects. The first of these was to mutate some humans into gargoyle-like creatures, for Xanatos to use as henchmen in the event that he was unable to recruit Goliath and his clan to his cause.Sevarius successfully mutated Derek Maza, Maggie Reed, Fred Sykes and the human now known as Claw, but they afterwards decided to go their own way and not serve Xanatos. Goliath temporarily kidnapped Sevarius in the hopes of forcing him to provide a cure for the Mutates, but released him after Elisa brought him to his senses.
The second project was to clone Goliath. Sevarius succeeded at this, creating Thailog. However, Thailog proceeded to trick Sevarius into "kidnapping" him and hold him for ransom from Xanatos at the Black Rock Point oil rig, then tried to kill Xanatos, Sevarius, and Goliath after making off with the ransom money. However, Elisa managed to rescue Thailog's three "fathers", including Sevarius.
It was revealed by Dingo that Sevarius was the one who turned Wolf into a mutate. Although hiterto, he has not been shown to be an expert in cybernetics, Sevarius may have assisted in Jackal and Hyena's upgrade.