Birdperson (Rick and Morty)

Birdperson, briefly known as Phoenixperson, is a friend of Rick Sanchez. He has known Rick for a long time and has seemingly known Morty since he was a baby. In the finale of Season 4, his cyborg form was dismantled and in Rick's possession before he was finally restored to his original form. According to Tammy Guterman, Birdperson's surname is a whistle which seems to begin in a G6# register which slides upward and then immediately down scale, similar to a bird's whistle.