User blog comment:MarvelDCandFantasyFanBoy12/The Thing Returns/@comment-3004323-20201005232650/@comment-24839525-20201005233412

Growgan:

Character: The Swarm (voiced by Udo Kier) - a creepy creature made out of locusts who has been haunting Billy's town.

Episode: Swarmed! - A bunch of locusts have been attacking people as Billy and Growgan has to try to stop it.

Jane:

Character: Brad (voiced by Ben McKenzie) - Linus' eccentric brother who just arrived in college and is very charming.

Episode: My Brother... Brad - Linus' younger brother Brad arrives in town as everyone is going Gaga over him, so Linus hires a crazy Hobgoblin mercenary named the Leaper to kill him.

Guardian Angel:

Character: Helena (voiced by Grey Griffin) - a fat and ugly demon who has been hypnotizing beautiful women to steal their beauty.

Episode: The Beauty Stealer - Danny learns that Lena is under a spell that is caused by a demon who has been extracting beauty from beautiful women.

Igor and Helena:

Character: George Gasto (voiced by Patrick Wartburton) - an eccrentric monster hunter who has sworn to hunt down Igor and Helena.

Episode: Stake Out - Igor and Helena learn that a crazy monster hunter has been stalking them in order to kill them.