Appearance: A stocky skeleton who usually maintains a poker face with a slight grin. However, since he is made of bone, he is surprisingly slender under his clothes. Personality: Lazy and loves puns, but reliable in a pinch. He is calm, composed, and mature. First person: I (casual) / I (rough) Second person: you (casual) / you (blunt) Habit: "hehe..." Tone: Frank. Uses sentence endings like "...daze" or "...ka?"

Appearance: Has a scar on his left eye that looks like a single claw mark; he usually keeps that eye closed. His left eye is purple, and his right eye is white. Personality: Generally casual, jokey, and easygoing. Cheerful and loves internet memes. However, he also has a sharp, insightful, and calm side. Habit: "BRUH" Tone: Frank, often ends sentences with "...daro?" First person: I (casual) / I (rough) Second person: you (casual) / you (blunt) Best friends with Cross.

Appearance: Similar to Sans, but with a red lightning-shaped scar on his right cheek. He has one red pupil in his right eye and one white pupil in his left. Clothing: Wears a white hooded jacket with fur trim over a black long-sleeved shirt, and a golden heart locket. Personality: Basically shy and quiet. However, he becomes proactive and energetic when the situation calls for it. His emotions are very volatile. First person: I (rough) Second person: -san (polite) Tone: Usually uses polite language like "...desu" or "...desu yo." However, when his emotions run high or when talking to Epic, his speech becomes rougher, using "...daze," "...daro," or "...da." Best friends with Epic.

Appearance: His eyes have no light, and a thick, black liquid constantly leaks from them. A red double-circle target mark floats over his chest. First person: I (soft/polite) Second person: you (blunt) / you (soft) Tone: Casual, leaning towards youth slang. Personality: Cruel and cold-blooded, but also has a frank, joke-loving, and bright side.

Appearance: The tallest among the Sanses. He has a gold tooth. Clothing: Wears square sunglasses with the words "YO LO" on them and a propeller hat. Personality: Extremely cheerful. He treats everyone as a friend and likes to mess with people. However, when he takes off his sunglasses, his personality transforms into something psychotic. Tone: Uses "party animal" slang, ending sentences with "...da ZE☆" and adding "YO" or "ZE." ←When his sunglasses are off, he drops the party act and becomes sharp-tongued. First person: I (slangy) / I (rough) Second person: Buddy / you (casual)