PJ Masks

PJ Masks (known as "PJs" for short) is the titular superhero team that fights crime at night to keep it from ruining people's days.

• Connor / Catboy (voiced by Jacob Ewaniuk in Season 1, Jacob Ursomarzo in Season 2-"Best Friends Forever", and Roman Lutterotti in "Meet An Yu"-present) – Connor is a blue-eyed boy with brown hair. When he transforms, he wears a blue cat costume. His powers include super speed, super sensitive hearing, and high jump.
• Amaya / Owlette (voiced by Addison Holley) – Amaya is a brown-eyed bespectacled girl. She has dark brown hair with a pink, wing-shaped hair clip.
• Greg / Gekko (voiced by Kyle Harrison Breitkopf in Season 1-Season 3 and the short films and Benjamin Hum in "HQ Tour" and Season 4-present) – Greg is a green-eyed, blonde-haired boy. When he transforms, he wears a green lizard costume with a thick reptilian tail and fins on top of his head. His powers are super strength, invisibility (though some may see him by noticing irregularities in the background), and sticking on walls for scaling.
• PJ Robot (voiced by Juan Luis Bonilla) – A robot who is in charge of the PJ Masks' HQ. Originally created by Romeo to spy on the heroes, but defected and switched sides.

• Teeny Weeny Ninjalino (actor unknown) – A tiny and cute ninja from "Catboy and the Teeny Weeny Ninjalino", who was supposed to spy on the PJ Masks but won Owlette and Gekko's affection.
• Armadylan (voiced by Max Calinescu in Season 2-"Armadylan Zen", Cristian Perri in Season 3 "Arma-Leader" - "Gekko Everywhere", Avery Esteves in Season 4 "Master Fang's Secret"-"Gekko Vs Armavillain", and Christian Campbell in Season 4 "Octobella's Garden"-present) – An armadillo-like boy who wants to be a hero, but his inexperience causes him to mess up. His abilities include super strength, producing earthquakes, and converting to a ball to roll on surfaces or travel underground.
• An Yu (voiced by Kari Wong) – A samurai girl who uses her bo staff as a weapon or to fly; it also turns into a magic flute. She lives in an Oriental-themed forest which can only be entered through portals.
• Lionel (actor unknown) – A small gekko who is the pet of Gekko, he normally appears when the PJ Masks are transforming.
• Newton / Newton Star (voiced by Shomoy James Mitchell) - A boy who emerges from a freak asteroid accident. The PJ Masks first met him in space. He also appears in daytime as a bespectacled boy. He made his debut in the Season 4 episode "Asteroid Accident".

• Romeo (voiced by Alex Thorne in Season 1, Carter Thorne in the short films and Season 2-"Owlette Slips Up", Simon Pirso in "Motsuki the Best"-present) – A mad scientist, and the main antagonist in the series. Romeo has two robotic assistants, Robot (voiced by Ron Pardo) and Robette (voiced by Julie Lemieux).
• Luna Girl (voiced by Brianna D'Aguanno) – Is a moon-themed villain with platinum blond hair who lives in a palace on the moon. In "Best Friends Forever", it is revealed that her Luna Magnet powers give her the power to breathe in space. Her main weapons are her Luna Magnet and Luna Board that she uses as a mode of transportation.
• Motsuki (voiced by Hattie Kragten) - An anthropomorphic moth whom Luna Girl regards as a little sister. Originally unnamed and one of Luna Girl's army of small moths, Motsuki was granted a special position among her fellow minions as well as a name by her big sister. She was later cocooned in crystal where she evolved into her current form as well as developing the ability of speech. The moths seem to like her as their leader than Luna Girl.
• Night Ninja (voiced by Trek Buccino in Season 1, Devan Cohen in the short films and Season 2-"Do the Gekko" and Jacob Soley in "Armadylan, Action Hero"-present) – Night Ninja, as his name suggests, is a ninja who leads a pack of Ninjalinos, and is the third villain of the series. He uses partially dried latex balls called Sticky Splats to trap his opponents, and smoke bombs to teleport to place to another. He is also acrobatic and can perform telekinesis.
• The Wolfy Kids (usually referred to as "the Wolfies") – Rip (voiced by Shechinah Mpumlwana), Howler (voiced by Kaden Stephen in Season 2-"Wolfies of the Pagoda" and Matthew Mucci in "Munki-gu in the City"-present), and Kevin (voiced by Ethan Pugiotto) are a trio of werewolf siblings who like to cause mischief. Their only power is shouting out red energy rings which would blow away things in a gale-like fashion.
• Octobella (voiced by Michela Luci) – A siren villain who debuted in Season 4 (though she made a cameo in Season 3). Upon meeting the PJ Masks at first, she appears interested in befriending them. But when she learned that Gekko obtained a crystal from her abode and develop some powers, she sees them as thieves, and becomes their enemy. Her abilities include throwing underwater tornadoes, invisibility, making various spells using crystals. Her henchman is Percival, a mumbling lobster.
• Munki-gu (voiced by Daniel Pathan) – A mischievous little monkey who loves to cause troubles, playing, and pranking on others. He was first seen at the New York Toy Fair 2020 as an action figure. He made his debut only as a statue in "PJ Party Mountain" and as a monkey in "Munki gu". His powers includes imitating other people's voices, flying with his magical boots, and pulling out infinite amount of bananas out of nowhere.
• Pharaoh Boy (voiced by Logan Nicholson) - He, as his name suggests, is a pharaoh themed villan who first appeared in a portal discovered in the museum. He will make his debut in a Season 4 episode titled with the same name to be aired on March 8, 2021. His official appearance is currently unseen and has yet to be revealed.