List of Dude, That's My Ghost! characters

(voiced by Rasmus Hardiker) Spencer is a 14-year-old boy and the protagonist of the series. He is a budding filmmaker and makes his own amateur movies on a regular basis and aspires to be a famous film director. Spencer is particularly fond of horror-and-gore movies, with nearly all of his own movies having to do with either zombies or monsters in some way. Spencer wears a blue guitar pick necklace that used to belong to Billy in order to see him. Because he is fairly new to Beverly Heights and is very different from the norm (in that he isn't rich, trendy, or the 'Hollywood type') he clashes with many people at his school and has garnered a number of enemies (Principal Ponzi, Lolo, & Kleet) although he receives help dealing with them from Billy. Likewise, Spencer helps Billy by protecting him from his enemies, like Madame X and Hoover. He also normally has to help solve problems caused by Billy as well, mostly pertaining to the effects of his ectoplasm and/or general antics.

(voiced by Darren Foreman) Billy is a fun-loving, mischievous, energetic, funny, hyperactive, and crazy ghost and Spencer's best friend. Before he died, he was an enormously famous pop-star, and is still very popular posthumously. He cannot be seen or heard by others unless they are wearing a personal item that belonged to him before he died (such as Spencer's necklace). Billy's personality consists of both a bro-centric best friend and a stereotypical narcissistic celebrity. He tries to help Spencer with his movies and fit in more with life in Hollywood, although many of his efforts normally cause more problems. He often describes his days as a rock star, in which it is shown that he was extremely difficult to work with (showing up to a video shoot 2 days late and refusing to perform because he didn't like the camera man's jeans), loved to trash hotel rooms and wreck music video shoots, and treated his crew and staff horribly. He can also be somewhat temperamental, especially when someone insults him or his music. Nearly every one of Billy's songs involve him singing about how much he loves himself or how much everyone else loves him ("I'm Still in Love With Me", "I Am the Sunshine of My Life", "You Love Me, I Love Me More", etc.) although sometimes they are about things related to stereotypically extravagant lifestyles ("Big Yachts and Money"). Billy is extremely wealthy: possessing a custom limo, several private jets, planes, and yachts, a pet crocodile, and the large mansion that Spencer's family now live in.

Billy's ghost body allows him to phase through objects and people, stretch his limbs, and transform into various things. He also has a number of powers, including the ability to possess people, instantly travel through computers and televisions, and telekinesis. Billy's most frequently-referred-to power (although one he has very limited control over) is the ectoplasm that his body is able to secrete. It is a blue, gooey substance that mutates or changes whatever it touches. Its effects are very erratic and unpredictable; it has the capability to mutate a small fish into a deadly piranha, give a video game sentience, and grant someone the abilities of a ghost. Its effects, however, can normally be reversed.

Billy regularly incorporates puns with the word "bro" into his vocabulary: (broaster oven, broham sandwich, George Bromero, Brohann Sebastian Bach, etc.) He does not share Spencer's love of horror movies, despite being a ghost; and is acrophobic, despite having the ability to fly. He also loves smooth peanut butter, but hates chunky. He is a distant cousin to the Wright family. His real name is Baruch Cohen ("School of Terror").