Mentioned, yet unseen characters in Rick and Morty.
“Coach Feratu is an unseen character that was mentioned in the episode Big Trouble In Little...Coach Feratu
“Katherine Heffelfinger is an unseen girl that was mentioned in the episode Interdimensional...Katherine Heffelfinger
“Unnamed Uncle is Jerry Smith's uncle who his mother, Joyce Smith, says had died. He is mentioned...Unnamed Uncle
“Special Agent Gribbles worked for the Galactic Federation, heading the investigations of Rick...Agent Gribbles