<Li> Scary Terry (voiced by Jess Harnell)--A murderous entity who resides in the dream world . He is a parody of Freddy Krueger and has miniature swords on his fingers instead of knives . He initially tries to kill Rick and Morty, but later befriends them after they help him with his own dream problems . He is very fond of the word "bitch", and injects it into almost every sentence . It is revealed that killing is simply an occupation for him, and that when he is not working he is a fairly pleasant individual . Unlike Krueger, who was a human that was burned to death and then became a demonic ghost, Scary Terry is of a different species and his burnt appearance is a naturally - occurring trait, as seen with his similarly "scary" wife and infant son, as well as the classmates and teacher seen in his dream . </Li> <Li> Dr. Xenon Bloom (voiced by John Oliver)--A sentient amoeba who co-founded Anatomy Park along with Rick . He is killed when the diseases of the park escape from captivity and overrun the park . </Li> <Li> Birdperson (voiced by Dan Harmon)--A superhero - like being who is Rick's best friend . He holds a deep respect for Rick, and often offers Morty insight when Morty considers doing something that would jeopardize his and Rick's relationship . He was at one point in a band with Rick and Squanchy . Birdperson, Rick, and Squanchy were once freedom fighters against the Galactic Federation's oppression; their "crimes" led the Galactic Federation to issue warrants for their arrests . Birdperson marries Tammy in the season 2 finale, but is killed by her after it is revealed that she is an undercover agent of the Galactic Federation sent to capture Rick and his associates . Birdperson's appearance is based on the character Hawk from 1970s series Buck Rogers in the 25th Century . In the opening of Season 3, Bird Person is turned into a cyborg called Phoenix Person by Tammy and Federation after Rick destroys the Federations economy and forces them to leave Earth . </Li> <Li> Revolio "Gearhead" Clockberg, Jr. (voiced by Scott Chernoff)--A robotic - looking "gearperson". He is well - versed in an event that occurred on his home planet called the "Gear Wars" and can play an instrument similar to a lute . Despite being one of Rick's friends, Rick doesn't even know his real name, preferring to call him "Gearhead", a racial epithet . Rick and Morty hide out at his house while fugitives for freeing Fart, and Gearhead betrays Rick by calling the police . Because of this, Rick beats him up and replaces his mouth gears with his "gearsticles". He has a somewhat effeminate voice, and a magazine entitled "Queer Gear" can be seen in his home, hinting that he is a gear - mosexual . Despite his betrayal, he is shown attending Rick's party in "Vindicators 3: The Return of Worldender", indicating that they are still friends . He catches Morty's Vindicators jacket after he tosses it away and is later shown attempting to pick up some gear women by pretending to be a part of the team . However, an actual disaster strikes, causing him to run away . He then trips on a pile of gears and falls, causing his arms and legs to break off . </Li>

Who voices bird person in rick and morty