Kris – A quiet human with messy dark hair, a blue sweater, dark pants, and red shoes. Calm, mysterious, and reserved, they rarely show emotion and often let their actions speak for them. Ralsei – A gentle Darkner wearing a green robe, floppy green hat, and pink scarf. Kind, caring, and optimistic, he always tries to help others and believes everyone can become friends. Susie – A tall purple monster with messy hair, a black vest, striped pants, and heavy boots. Tough, fearless, and blunt, she hides a loyal and caring heart beneath her rough attitude. Noelle – A reindeer monster with light fur, small antlers, and a purple-and-pink outfit. Shy, kind, and compassionate, she often lacks confidence but deeply cares about her friends. Lancer – A small blue Darkner with a spade-shaped head, blue hood, and black cape. Mischievous, energetic, and goofy, he loves making friends even if his plans don't always work out.

Sans – A short skeleton with a permanent grin, wearing a blue hoodie, black shorts, and pink slippers. He's lazy, loves telling bad jokes and puns, but is surprisingly intelligent and protective of the people he cares about. Also the older brother of Papyrus Papyrus – A tall skeleton dressed in a white battle body suit, red scarf, red gloves, and red boots. He's energetic, kind-hearted, and determined to become a member of the Royal Guard, though his confidence often exceeds his experience. Frisk – A quiet human child with brown hair, a blue sweater with purple stripes, blue shorts, and brown shoes. Calm, curious, and compassionate. Chara – The first fallen human, with short brown hair, rosy cheeks, a green sweater with a yellow stripe, brown shorts, and brown shoes. Once quiet and determined, Chara is mysterious and morally ambiguous.