
However, as seen with the difficulty with fulfilling Jerry's wish, the Mr. Meeseeks (voiced by Justin Roiland) - Creatures summoned by activating a Meeseeks Box, existing until they fulfilled the purpose they are assigned. Jacob (voiced by Echo Kellum) - A family friend of Jerry's parents, and is later revealed to be Joyce's lover.
Ethan (voiced by Dan Benson) - The boyfriend of Summer. Leonard Smith (voiced by Dana Carvey) - Jerry's father, Joyce's husband, and Morty's grandfather. Joyce Smith (voiced by Patricia Lentz) - Jerry's mother, Leonard's wife, and Morty's grandmother. Snuffles, also known as Snowball (voiced by Rob Paulsen) - Morty's pet dog featured in the episode " Lawnmower Dog." Snuffles is a small, fluffy white-haired dog that experiences some trouble with being potty trained until Rick develops an IQ-enhancing helmet for him at the request of Jerry. He is shown to be a jock who plays sports for the high school. Brad (voiced by Echo Kellum) - A student at Harry Herpson High School. Gene Vagina (voiced by Phil Hendrie) - The principal of Harry Herpson High School. Goldenfold (voiced by Brandon Johnson) - Morty's math teacher. Jessica (voiced by Kari Wahlgren) - A classmate of Morty's that he is crushing on. These are the characters present in more than one episode in the first season.
Summer (voiced by Spencer Grammer) - Morty's angst-ridden older sister who occasionally joins Rick on his adventures.
Beth (voiced by Sarah Chalke) - Morty's holier-than-thou mother, a cardiac surgeon for horses. Jerry (voiced by Chris Parnell) - Morty's insecure father, whose disapproval of Rick's influence on Morty only deepens his marital troubles with Beth. Morty (voiced by Justin Roiland) - Rick's impressionable grandson who is often dragged along on his grandfather's escapades. Rick (voiced by Justin Roiland) - A genius scientist and alcoholic whose inventions and experiments serve as the basis for the episodes. Starring: Eric Bauza, Paul F.These are the characters present throughout the majority of the episodes in the first season.