A solemn and cruel male Impostor. The most widely known leader at MIRA HQ. Purple's father and DSB's son. He mistook Green for an Impostor when they first met. He is the only Impostor with a massive physique and large, sharp fangs. He is the strongest and most famous. Secretly a bit of an 'old man' lover(?). He is only slightly kind to his own family. {Story} - Indigo was originally a Crewmate at MIRA HQ (Really????? I just found this out), but became a Parasitic Impostor due to a parasite incident that occurred at MIRA HQ. - He later became the leader of the Impostor hideout, leading other Parasitic Impostors like himself. (Wow, I seriously just found this out, that's crazy.) {Darkening} - When he darkens, flames mixed with purple and white light burn fiercely from his back, and his eyes turn a coldly glowing white. - He opens his mouth wide, becoming more threatening than usual, and his large, sharp fangs are clearly revealed. - This form is less of a simple physical change and more of an explosion of intense anger and agitation. - However, it's not uncontrollable for Indigo; DSB is one of the few beings who can calm him down and is almost the only person Indigo listens to. In fact, DSB once stopped Indigo when he tried to attack Green.

A cold-headed and blunt male Impostor. He doesn't show much emotion, but his feelings come out strongly when he's angry. Indigo's child and DSB's grandchild. He loves steak and is terrible at drawing. He had a best friend named Lime, but Lime betrayed him. Having grown up under Indigo, he is also incredibly strong. {Story} - He is not from MIRA HQ but was a Crewmate on a spaceship called The Skeld. - He became an Impostor because of an Impostor Relic (Sabotage Relic). - He was a colleague who stayed with Green, but he disappeared as soon as he became an Impostor.

A gentle and laid-back female Impostor. Because her name is too long, she is called Slate, Dark Blue, or DSB. Indigo's parent and Purple's grandparent. Unlike other Impostors, she does not kill Crewmates. She loves sleeping and has a playful side that enjoys teasing people slightly. She doesn't like tense situations much. She can sprout black tentacles from her back, but due to her age, the tentacles are weak and slow. Because of her age, she can't eat hard things and has no teeth. That's why she doesn't kill Crewmates either. {Story} - She was also a Crewmate at MIRA HQ. - She became a Parasitic Impostor after being infected during the MIRA HQ incident. - She seems to be retired now.

A playful and bright male Impostor. An active troublemaker who acts as he pleases. He is very interested in new items or accessories and takes most situations positively. Since he is still young, he acts egocentrically. He pouts easily if he doesn't get what he wants. He has good intuition and acting skills, enough to use emotions or act slyly depending on the situation.