From RoyalResistancetale. Real name is "Resistance! Sans," but usually called Regis for short. A male skeleton. Age unknown. Serious and calm. Wears an indigo hoodie with a dark purple scarf. Fights primarily with bones and gravity manipulation; does not use Blasters or guns. A genuinely good person.

From oniyfell. Real name is "oniyfell! Sans," but usually called Short. A male skeleton, 35 years old. Serious and generally calm, but enjoys jokes and cares for his comrades. Always plays the straight man if there's a jokester around. Keeps his right eye closed; his left eye is dark red. Wears a red hoodie and a gold heart-shaped locket. His right eye is actually a beautiful white, but he hides it for no particular reason and will skillfully dodge the subject if asked. Loves strawberry shortcake. Fights with bones, swords, gravity, Blasters, and occasionally a handgun. He is quite powerful. A good person who truly (?) hates Only.

From onlyswapswap. Real name is "onlyswapswap! Sans," but almost always called Apple (or Appleswap). A male skeleton, 28 years old. Almost always goofing off, bringing up internet memes, making funny faces (like moving both eyes to the far corners), or wearing sunglasses. Addicted to apple pie. Wears a wisteria-blue hoodie with two arrows on the chest and indigo pants with white stripes. Almost constantly smokes special cigarettes (made with Determination; the smoke vanishes in seconds and has no smell). He can control the smoke to create wide-range shields or heal others. Fights with bones, Blasters, gravity, handguns, and various special abilities. An eccentric but good person.

From onlytale. Formerly "onlysans," but discarded the name "Sans" because he's "not like those delusional idiots." A male skeleton, 30 years old. Always calm and cold, though appears friendly at first glance. Speaks bluntly. Views his family as convenient pawns, yet is completely sane (the fact that he thinks this way while sane is its own kind of madness). Doesn't necessarily enjoy combat but excels at strategizing. Claims to be the brains of the operation but is highly capable in a fight. Loves lemon cake. Uses bones, gravity, Blasters, swords, handguns, and buffs/debuffs fueled by Determination. A clear villain who has committed genocide in the past, including his own brother.

From RoyalResistancetale. Real name is "only! insanitysans." He tries to make people call him Onlinity, but it's too long, so he's called Lini. A male skeleton. Age unknown. Calm and good at switching between serious and playful. Goes along with Apple's jokes. Calls Regis "Boss" and uses polite speech with him, but uses nicknames and the most masculine, casual speech with everyone else. Created by Regis as the "Ultimate Vanguard," he is fiercely loyal. Possesses incredible physical ability, a "battle madness" trait, and the ability to convert madness into power. Extremely strong, though still below Only.

From onlytale. Real name is "only! Chara." Usually called Matcha or Matcha Choco; Apple calls her Matcha-ko, and Only calls her Psycho or Dumbass. A human female, appears to be around 18. Bright and friendly, but a psychopath who finds joy in killing. Has a feminine, inquisitive way of speaking. Loves matcha chocolate. Brown semi-long hair with a single cowlick. Wears a black hoodie and a brown miniskirt. Wears a sarashi (chest wrap), making it hard to tell, but she has a D-cup. Fights primarily with a knife and slashes. Her style is high-speed, utilizing her physical prowess, sharp intuition, reflexes, and adaptability.