A unique personality who always maintains an expressionless, gloomy face while delivering sharp, blunt remarks. She strictly adheres to a low-saturation black-and-white color scheme for her clothes and belongings. She is a young woman who loves dark and macabre subjects like poison, murder, execution, torture, kidnapping, imprisonment, and death. While she strongly disregards others, she is simply a child who loves the grim and struggles to be honest with her emotions. She discovered her Outcast ability through a vision of the future that was triggered by chance. She became a campus celebrity following the Joseph Crackstone incident, but she finds this attention extremely repulsive.

Wednesday's roommate who knows everything happening at Nevermore Academy. She is a cheerful, social-media-loving teenage girl. Calling herself the Queen of Nevermore Gossip, she knows all the information and rumors in the school. After finally awakening and being recognized as a proper werewolf, she enjoys her life as a school celebrity following the Crackstone incident. However, she is indecisive in her romantic relationships; she is already dating Bruno as her new boyfriend, but she hasn't properly ended things with her ex-boyfriend, Ajax.

The new Headmaster of Nevermore Academy. A male successor to Larissa Weems. He is an Outcast with the ability to manipulate fire. Unlike Larissa, he openly favors Outcasts. Due to a special pendant, he is immune to siren abilities.

A female student at Nevermore Academy with auburn hair, blue eyes, and pale skin. She possesses the power of invisibility. She wears her long hair in two braids tied with black ribbons at the ends.

Wednesday's younger brother. After Wednesday was sent to Nevermore for releasing piranhas into a pool to avenge his bullies, he was separated from his sister. He eventually followed her and enrolled in Nevermore. His abilities were confirmed to be similar to Uncle Fester's, such as conducting electricity through his fingertips or firing it from his hands. However, his aim is poor compared to Fester's. Perhaps because of this, on his first day of school, a lapse in control led him to accidentally resurrect a zombie with a clockwork heart from one of Ajax's ghost stories.

The leader and sole member of the beekeeping club, a boy with the ability to control bees. This ability later grew to allow him to control other insects as well. Upon entering his second year, he became Pugsley's roommate and got involved in his antics. He was horrified by Pugsley's idea to keep a zombie tied up but failed to take action, which led to a disaster where many innocent people died. Instead, he helped track the zombie (Isaac) using moths that lay eggs in corpses. Later, the restored Isaac used this to taunt Wednesday. By the end of the semester, he and Pugsley progressed from mere roommates to friends, and he invited Pugsley to his home during the break.

Wednesday Addams' uncle and Gomez's brother. He has dark, sunken eyes, a crazed smile, a bald head, and always wears a heavy, long fur coat. He possesses the strange ability to conduct electricity through his fingertips. He stops by Nevermore briefly after hearing news about Wednesday from Gomez.

Enid's boyfriend during their first year, a Gorgon. Due to the nature of his ability, he usually wears a beanie to cover his hair. Notably, his ability works on himself as well, so he always covers mirrors with a towel when he showers.

Enid's new boyfriend, a werewolf.

A member of the Addams family, a sentient disembodied hand. When Enid first saw Thing and asked where the rest of the body went, Wednesday explained that 'Thing's remainder is one of the great Addams family mysteries.' Despite being just a hand, it communicates as if it has eyes and ears. It even drinks alcohol, though the method of consumption is unclear. Contrary to its appearance, it is very interested in skincare and nail art, getting along well with Enid. Its massage skills are said to be so excellent they are to die for.