Fives seems to get along really well with his brother he even moves in with Low Five Ghost after Muscle Man got married and Starla moved into their trailer. Low Five Ghost looks almost identical to his brother, except that Low Five Ghost has a bit of scruff where his 'chin' would be, and wears teal sunglasses. In ' See You There,' it is revealed that Hi Five Ghost has an older brother named Low Five Ghost. They also have a son who is a half ghost-human hybrid. In the ' A Regular Epic Final Battle' epilogue, she and Hi Five Ghost are shown to be married after Fives returns from space and the both of them get married and become famous DJ's.

In ' Welcome to Space,' a picture of her and Fives is shown of her kissing Fives on the cheek, to show that she will still love him even if he is in space. In ' Rigby's Graduation Day Special,' she shows concern for Fives when the Park blasts off into space. When the repairman grabs Fives, Celia is shown concern for her boyfriend when he is in trouble. In Hi Five Ghost's Halloween story 'Going up' in the Terror Tales of the Park V episode, Fives is trying to get to Celia's floor at her apartment building while trying to get past the Elevator Repairman, who is later revealed to be a ghost haunting the broken elevator for 40 years. They also dance, and during a slow song, Celia kisses Fives under a mistletoe. In ' Merry Christmas Mordecai', they are seen talking to Muscle Man and Starla. Here, he bumps into Celia, and they begin to talk once more. After not being able to read her post-card, and trying to find her location, Hi Five Ghost finally gives up, going to the coffee shop him and Celia visited four years ago. After figuring out a way to keep in contact (by sending a post-card after four years), they then leave the coffee shop. However, Celia explains how she has to go back to Prague to finish her studies. They both realized they had a lot in common with each other. In ' The Postcard' it is revealed that Hi Five Ghost met Celia four years ago in a coffee shop. Hi Five Ghost seems to be the only character to respect Mordecai and Rigby other than Pops. In 'Gut Model', Hi Five Ghost was happy to be paired up with Mordecai and Rigby. Hi Five Ghost is friends with Mordecai and Rigby, as shown in ' Muscle Woman', but other times Hi Five Ghost is in conflict with Mordecai and Rigby, namely because Muscle Man does this as well, as shown in ' My Mom', ' The Night Owl' and 'Slam Dunk'. Muscle Man usually addresses Hi Five Ghost as 'Fives'. Muscle Man explains how he and Hi Five Ghost met, and became friends after he saved him from a bottomless pit. Muscle Man enjoys playing basketball with Hi Five Ghost, as shown in episodes such as ' Slam Dunk' and ' Temp Check'. In the episode ' Gut Model', he officially told Muscle Man that he was his best friend.

Hi Five Ghost and Muscle Man are best friends ( or best bros). Ironically, being a ghost, its been shown that the subject of death makes him incredibly sad as shown in ' Trucker Hall of Fame' and ' The End of Muscle Man.' According to the scientist in ' The Button,' he states that Hi-Five Ghost is the most logical out of the park workers. He is very loyal to his best friend Muscle Man, always supporting him even when he's at his nastiest.

While the majority of the time Hi-Five Ghost is quiet and stands in the background, he shown to be supportive, kind, logical, and sometimes scatter-brained depending on the time. However, during the Park's 25-year reunion, Hi Five Ghost strangely looks identical to his younger self. He also wore two bracelets on his arm and a red beanie. He does not seem to possess any eyeballs and his mouth is usually seen open when smiling or frowning.ĭuring the time montage, Hi Five Ghost has grown a white goatee and has gained laugh lines, making him look older in appearance. His body is white but slightly transparent. Hi Five Ghost is a small Pacman-esque ghost with a small arm and left hand sticking out from the top of his head.

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