A kind but sensitive male Impostor. He became an Impostor after taking half of Purple's pebble-like sabotage device. He was allied with Fortgreen but broke it off after being gaslit. He has great combat skills, suffers from insomnia, and sees ghost hallucinations when stressed. Best friends with Blue and White. Good with babies. Kind to Crewmates but has a foul mouth toward Impostors. He was born a Crewmate and only became an Impostor a few months ago, so he never kills. He's been a great fighter since his Crewmate days and currently looks ready to kill Fort(?). He once saved Yellow in the past.

A cold-hearted and blunt male Impostor. He is currently obsessed with the half of the pebble-like sabotage device that Red took from him (he also became an Impostor because of that machine in the past). Allied with Pink. He is the strongest in combat, bad at drawing, and likes steak (though he doesn't mention it). He's quite handsome. He treats almost everyone coldly except for his close ally, Pink. He rarely shows facial expressions and doesn't boast about strange things. He once sent Fort flying with a single punch.

A sly and rude male Impostor with four tentacles on his back. As a shapeshifter, he can change his skin color at will. He has secretly placed tentacle monsters all over Polus; these monsters can send signals to Fort and instinctively track living beings according to his commands. He was allied with Red but broke it off after gaslighting him. He is incredibly strong in combat. When he gets angry and turns dark, his entire eyes turn blood red. Despite the broken alliance, he keeps telling Red to commit murder. He is fearless until he actually experiences danger. He gets slightly shaken when things don't go his way.

A lively and cheerful female Impostor. She really loves pizza and ice cream. Allied with Purple and close to Blue, she's the comic relief character. She has three snake-like tentacles on her back. She has a free-spirited personality, living exactly how she wants. She lives the most boldly among the group. She has teeth of steel and a stomach of steel(?) strong enough to chew through Fort's tentacles. If she makes a mistake, she gets hurt and clings to Purple.

A clueless and bright male Crewmate. He is covered in bandages from various injuries. Because he's so oblivious, he's always being dragged around by White. He owns a personal kickboard and a tablet. Best friends with Red and White. He likes helping others. He is afraid of Impostors (except Red) and is close to Pink. He is a coward, loves games, and is good with babies. He lives in the base's medbay, so he's constantly nagged by Ten.

A quick-witted and kind female Crewmate. She has top-tier social skills and is the best at assessing the situation. She's always dragging the clueless Blue around. She dislikes other Impostors (except Red) but fights with Purple the most. Best friends with Red and Blue. Her job is a Communicator. She's good at taking her friends' sides. She's also close to Yellow. She lives strictly to maintain her social standing, but she becomes a total sweetheart in front of her friends. She's quite pretty.

A gentle and mild-mannered female Crewmate. A single mom (presumably) raising Glitch alone. Since Red once saved her life, she views him as a savior. She keeps a close eye on her son regardless of time or place. She stutters when flustered and makes frequent mistakes. She only trusts close friends to watch Glitch. Close with White and Ten. Afraid of Impostors (except Red). She's often called a pushover because she's too nice, but surprisingly, she's good at hitting people.

A kind and positive male Crewmate. He trusts people too easily and looks innocent on the surface, but he becomes extremely violent if betrayed by someone he once trusted (e.g., Purple). He calls Purple his self-proclaimed best friend. He plays well with Glitch but isn't very skilled at handling him. He has a crush on Yellow. He has a sensitive side and needs to wear an eye mask to sleep.

A kind and gentle female Crewmate. A doctor working in the base's medbay. She provides excellent treatment due to her professional spirit. She is kind to almost everyone. Close with Brown. She's a bit afraid of Fortgreen but treats him kindly. She's a bit of a coward and cries easily. She loves chatting with the girls. She considers Blue to be somewhat pathetic(?).

An indifferent and cold male Crewmate. The leader of Polus. He filters out people who annoy him on his own. He is wary of Fortgreen. He is perceptive and quick to grasp the situation. He is the oldest one here. He dislikes all Impostors, whether he's close to them or not. He fights with Yellow a lot. He's the leader but can't beat any of the Impostors, unfortunately. Close with Ten.