Here are the list of Real World characters in Crossover Universe, who are not fictional and are only guest characters.
- Mayor Hugh (voiced by Dee Bradley Baker), the mayor of Strongfield.
- Ryder DeVine (voiced by Scott Menville), Lucy Reede's love interest.
- Kiki Reede (voiced by Ava Acres), Lucy's 5-year-old sister.
- Brian Schneider (voiced by Greg Cipes), Annabelle Sullivan's love interest.
- Theresa Rose (voiced by Ariel Winter), Annabelle's friend.
- Alison Baker (voiced by Grace Kaufman), Annabelle's former rival.
- Layla Hart (voiced by Hynden Walch), Lucy's friend at school.
- Courtney Asher (voiced by Stephanie Anne Mills), Annabelle's cousin.
- Andrea Marano (voiced by Harley Graham), a leader of the Glee club at school.
- Florence Loveliss (voiced by Emily Nunez), a mysterious elf girl.
- Jennifer Karpati (voiced by Molly Quinn), a principal of Strongfield High.
- Rochelle Sanchez (voiced by Melissa Villasenor), Lucy's aunt.
- Vivenne Theobald (voiced by Cindy Robinson), Johnny Theobald's 15-year-old cousin.
- Joshua Hart (voiced by Robbie Daymond), Layla's 17-year-old brother.
- Flora (voiced by Ashley Johnson), the earth fairy.
- Fira (voiced by Olivia Olson), the fire fairy.
- Ocean (voiced by Ashly Burch), the water fairy.
- Windy (voiced by Karen Strassman), the air fairy.
- Voidia (voiced by Tara Strong), the void fairy.
- Frostii (voiced by Courtenay Taylor), the ice fairy.
- Queen Josefina (voiced by Tara Strong), a ghost of a Renaissance queen who haunts the castle.
- Thealia (voiced by Karen Strassman), Serana's vampire ancestor.
- Nocturnia (voiced by Liliana Mumy), Vampire Queen's daughter.
- Death (voiced by Maurice LaMarche), a skeleton-like ghost from the Underworld.
- Orchid (voiced by Eden Sher), Death's assistant who works with Serana.
- Sinclair (voiced by Laura Bailey), an evil ghost of a warrior who was killed in a battle.
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