|Hi Five Ghost's Father|
|Relatives:|| Hi Five Ghost (son)
Low Five Ghost(son)
|Voiced by:||Mark Hamill|
|Appears in:||"See You There"|
Hi Five Ghost's Father appears in the episode See You There where, in Muscle Man's prank, he pretends to be a doctor who announces that Muscle Man is dead. After the prank, he tells Mordecai and Rigby that he isn't actually a doctor, and that he was simply part of Muscle Man's prank.
He looks exactly like Hi Five Ghost except he has a white beard, bushier eyebrows, and a couple of wrinkles.
- He was the fifth family member of one of the main character to appear in the show. The first was Don, then Mr. Maellard, then John, and then Low Five Ghost.
- He is the second family member of Hi Five Ghost and appeared in the same episode with his other son, Low Five Ghost.
- In Exit 9B, in Hi Five Ghost's flashback, a woman who was assumed to be his mom was craddeling him and a man hi fived him. That may have been Hi Five Ghost's father.