Seymour Tantz (a.k.a Genius Leader) is a character portrayed by Ian Hecox.
Seymour first appeared in SIRI TRIED TO KILL ME! as one of the two geniuses in SIRI TRIED TO KILL ME! Along with Brody, Seymour attempted to locate, and destroy Siri after she went rogue. He was the only one to survive between him and Brody.