Casper is a friendly ghost, and the most peaceful student at Scare School and possibly the kindest in the entire underworld who is friendly to humans and doesnt like to scare people unless forced to. Friends with Ra, Mantha, Wolfie and many other monster students, doesnt need to wear clothes, can phase through solid objects and can fly, has purple eyes and a seethrough white body that subtly glows

Thatch, A cocky, aggressive vampire who is the main bully of the school constantly trying to get Casper in trouble for being nice, who also has a band with Slither and Harpy who he lead sings in, the band is called Fang Gang, friend group is with Slither, Harpie, Dummy Girl, and Mosshead, having corpse grey skin, purple eyes, slightly pointed ears black and white streaked short hair, always wearing a white suit undershirt, black jeans, black belt and silver belt loop chain with a black and satin red silk vampire cape, black spiked converse boots, sharp fangs used to bite and feed off humans and or get other monsters under his power via hypnosis, enhanced hearing and sense of smell for blood, favorite snack if candied blood worms

Mantha is a very playful, but also very brave and smart zombie, friends with casper and ra, able to detach and reattach limbs and control them while detached, having blue long hair, greyish blue skin and purple eyes, wearing a dark reddish pink ripped long sleeve shirt with a daisy print on the front, black pants and black boots with hot pink shoelaces

Wolfie, A somewhat insecure werewolf who is a loyal, helpful friend, and a werewolf

Quasi: A hunchbacked, obedient caretaker who loves cleaning, especially with his favorite mop

Mosshead, A unintelligent, messy, and dirty swamp monster

Alder & Dash, The two-headed school principal who is hypocritical, mean, and despises friendliness.

Slither is A calm, intelligent, yet mischievous snake-like bully in Thatch's gang