Although the family member whose actions are the most monstrous, Otis is not a "biological" member of the Firefly family at all. Gloria "Mama" Firefly adopted him, but not legally. In the song "Pussy Liquor", the lyrics suggest that Otis' biological father's name is Dale. He is named after the Groucho Marx character in the film "A Night at the Opera". He and Baby have a combative brother/sister relationship and spend much of the sequel screaming at each other during the family's road trip of murder and fleeing from Sheriff Wydell.