Big Boy Peterey

Big Boy Peterey is the son of Saturn and Princess Luna. Despite being dead he continues to show up in the story.

Appearance
Big Boy Peterey is a small and deformed fetus. It resembles a jigglypuff from Pokemon. Despite their appearance, the "wings" on it's head are in fact ears. It moves by waddling around on the floor.

Synopsis
Big Boy Peterey was born prior to the Tournament Arc, in the filler episode Protection, to parents Saturn and Princess Luna. Peterey was born incredibly deformed as his parents were of different species. After three days of life his mother made the tough decision to smother him while he slept. He would later haunt both her and Saturn throughout their journeys.

Relationships
Saturn: Big Boy Peterey was disliked by his father. Saturn believed he was a mistake and was glad he died. Later Saturn would come to love and accept his ugly son.

Luna: Luna loved Peterey more than any of their other children. It is because of this love that she decided to kill Peterey. She would later be scene crying and mourning over her lost son. In the Tournament Arc, Peterey would appear to Luna as a ghost.

Lapiz Lazuli from Stevens Universe and Saturn Jr.: Both of his siblings are unaware of his exsistance.

Trivia

 * Big Boy Peterey is neither big nor a boy so his name is considered a mystery.
 * Some fans speculate that Peterey's deformities were caused by Saturn's attempts to abort him via punching Luna in the stomach.