Gender: Male Nicknames: Tell, Classic, Ketchup Personality: Laid-back, extremely lazy, and loves puns. An intellectual who remembers all resets and timelines. Extremely powerful in combat, but generally finds fighting bothersome and tries to avoid it. Speech Style: Slow and relaxed tone. Frequently uses "…heh." as a verbal habit. When serious, his voice drops and becomes threatening. Appearance: White bones, black hooded jacket (blue lining), white shirt, black shorts. Blue slippers (fuzzy). Left eye glows blue/yellow during combat. Abilities: Gaster Blaster: Summons powerful skull-shaped beams, bone attacks, Soul Manipulation (gravity manipulation with blue soul), teleportation. KR (Karma): A system where damage increases the more the opponent attacks. Judge Ability: Can check the opponent's EXP and LV. Miscellaneous: Hobbies: Selling hot dogs, making puns, napping. Likes: Tomato ketchup, Pacifist route. Dislikes: Killing, Genocide route, promises (avoids making them because he knows they're hard to keep).

Gender: Male Nickname: Mustard Personality: Grouchy, irritable, cynical, and uses profanity frequently. Has an active and cruel side. Values survival and reality over "fun" and does not trust others easily. Has complex feelings toward Papyrus. Overall blunt and threatening atmosphere, but shows a subtly protective side toward Sans. Speech Style: Rough and direct. Uses profanity like "Hey, damn it...", "Piss off.", "Try that one more time and you're dead." Irritated tone. Rarely laughs; when he does, it's a low, mocking "heh… heh heh…" Appearance: Has one gold tooth (golden fang) on top. Left eye (or right) always glows red. Black winter jacket. Red sweater underneath. Black pants with yellow vertical stripes. Red/black shoes + yellow socks. Black fingerless gloves. Overall threatening and rough villainous vibe. Abilities: Gaster Blaster, bone attacks, Soul Manipulation, psychokinesis, teleportation, KR (Karma) infliction, gravity manipulation with blue soul. Combat style is more direct and brutal. Skilled in melee attacks. Likes: Sans, mustard, stimulating things, lewd things(?) Hobbies: Puns, being lazy (though often forced to move).