While most of the characters who only appear in the background are students of Monster High, at several occasions guys and girls from other schools have shown up. The Monster High wiki has opted to give them a separate page to unburden the main backgrounders page. Included here are the unnamed students from Belfry Prep and Crescent Moon High, since the nature of the merge is unclear and the Belfry Prep students hold on to their uniforms. Meanwhile, sometimes the animators use models of regular background students of Monster High to depict students from other schools. Such background characters are not listed here.
Unknown sea creatures[]
Two cilophyte-like creatures were among the people in "Falling Spirits" who were sent the link to the Fear Squad's promotional video and sent it on to their friends. It is unknown whom they know at Monster High, but it can't be Gil (since they are sea creatures) or Lagoona (since she was observing the view counter with the Fear Squad at the time).
Unknown school for vampires[]
In "Fear-A-Mid Power", Monster High's casketball team played a game against the team of another, unidentified school for vampires. Given their red and black uniforms, they could be from Smogsnorts Vampyr Academy or Belfry Prep, but not necessarily either of the two. One of the team member's models was reused for a Monster High student in "Unearthed Day".
Smogsnorts Vampyr Academy[]
The vampire fearleaders from Smogsnorts Vampyr Academy were Monster High's main rival during the Gloom Beach fearleading competition. In "Witch Trials" and "Don't Cheer the Reaper", they were shown to be a highly disciplined team. Despite this, they accepted Toralei Stripe's offer to spy on the Fear Squad and stole their moves. Due to Scary Murphy's training, the Fear Squad still won the competition in "Road to Monster Mashionals".
One of the team member's models was reused for a random student in "Monster Mashionals Part 1" and a Monster High student in "Unearthed Day".
Belfry Prep[]
Vampires of Belfry Prep first showed up in "Fear-A-Mid Power", when three of them competed against Monster High in a debate contest and presumably won. Some time later, they joined the Monster High student body in "Fright On!", when their school was merged with Monster High. After some initial hostilities, particularly to the Crescent Moon High students who also were part of the merge, the vampires got their act together and started playing nice. The only two of the Belfry Prep students whose names are known are Bram Devein and Gory Fangtell, who have their own pages. The other vampires consist of five girls and six boys (excluding the three boys from the debate team).
- The vampire girl with blue hair appears in "Fright On!", "Super Fan", "No Place Like Nome", and "Unearthed Day".
- The vampire girl with green hair appears in "Fright On!", "Super Fan", and "Unearthed Day". She was misdrawn to have yellow hair in one scene in "Fright On!".
- The vampire girl with dark skin appears in "Fright On!" and "Unearthed Day". She's a member or previous member of Belfry Prep's fearleading team.
- The vampire girl with semi-dark skin appears in "Fright On!", "Super Fan", "Hickmayleeun", and "Unearthed Day". She's a member or previous member of Belfry Prep's fearleading team. She was given a line of dialogue in "Fright On!".
- The vampire girl with black hair appears in "Fright On!", "Super Fan", and "Unearthed Day". She's a member or previous member of Belfry Prep's fearleading team. She was given a line of dialogue in "Fright On!", and she has received a toy: her appearance is among the first four Create-A-Monster starter packs.
- The vampire boy with red hair appears in "Fright On!".
- The vampire boy with purple hair appears in "Fright On!".
- The vampire boy with dark skin appears in "Fright On!", "Super Fan", "Unearthed Day", and "Creepfast Club".
- The vampire boy with semi-dark skin appears in "Fright On!".
- The vampire boy with blue-black hair appears in "Fright On!", "Super Fan", "Uncommon Cold", "Unlife to Live", and "Unearthed Day".
- The vampire boy with red-black appears in "Fright On!".
- The three vampire boys that make up the debate team appear in "Fear-A-Mid Power".
Crescent Moon High[]
The werewolves of Crescent Moon High joined the Monster High student body in "Fright On!", when their school was merged with Monster High. After some initial hostilities, particularly to the Belfry Prep students who also were part of the merge, the werewolves got their act together and started playing nice. The only three of the Crescent Moon High students whose names are known are Romulus, Dee O'Gee and Brocko, who have their own pages. The other werewolves consist of five boys and six girls.
- The werewolf girl with orange hair appears in "Fright On!" and "The Nine Lives of Toralei".
- The werewolf girl with pink hair appears in "Fright On!", "The Nine Lives of Toralei", and "Abyss Adventure". She has received a toy: her appearance is among the first four Create-A-Monster starter packs.
- The werewolf girl with dark pink hair appears in "Fright On!" and "The Nine Lives of Toralei".
- The werewolf girl with purple hair appears in "Fright On!", "The Nine Lives of Toralei", and "Unearthed Day".
- The werewolf girl with blonde hair appears in "Fright On!", "Hickmayleeun", "The Nine Lives of Toralei", and "Unearthed Day".
- The werewolf girl with brown hair appears in "Fright On!", "Hickmayleeun", "The Nine Lives of Toralei", and "Creepfast Club".
- The werewolf boy with white skin appears in "Fright On!" and "Super Fan".
- The werewolf boy with brown hair appears in "Fright On!" and "Super Fan".
- The werewolf boy with red skin appears in "Fright On!", "Super Fan", and "Unearthed Day".
- The werewolf boy with orange hair appears in "Fright On!" and "Unearthed Day".
- The werewolf boy with black hair appears in "Kind: The Shockumentary" and "Fright On!".
West Valley High[]
The mages from West Valley High appeared in "Super Fan" as the opposing team in a casketball game with Monster High. They are magicians, but their species isn't identified. Their long ears and thin look do give off the impression they are elves. They cheated during the game by using a crystal ball to predict the Monster High team's moves, but Ghoulia destroyed the object, making it possible for Monster High to win.
