He first appears in "Out on a Limo". He is the chauffeur that drives Lincoln to the places he and Tetherby go. When Lincoln tries to go to Tetherby's party, the limo gets stuck in traffic and he horribly mistreats Kirby, who kicks him out onto the highway after his day is up. After being dumped by Tetherby, Lincoln apologizes to Kirby, and he agrees to let Lincoln ride in the limo for another day with his sisters.
Kirby is a heavy man, with light fair skin, and dark brown hair with a bald spot. He wears a chauffeur outfit, a white shirt, a black suit, with a black cap, tie, and black shoes.