Appearance: A short skeleton. White pupils. No hair. Clothing: A blue hoodie over a black school uniform. Personality: Easygoing and lazy. Gender: Male. Papyrus's older brother. The original version.

Appearance: A tall skeleton. White pupils. No hair. Clothing: A properly worn black school uniform. Personality: A loud-voiced goofball. Gender: Male. Sans's younger brother.

Appearance: A blue fish-like appearance with fins for ears. Long red hair. Yellow eyes with black pupils. Jagged yellow teeth. A black eyepatch over her left eye. Clothing: A black school uniform. Personality: Masculine and tough. Gender: Female.

Appearance: Short brown hair with hints of yellow. Golden eyes. Clothing: A white collared shirt with a red tie. A black skirt. A blue cardigan with two thin magenta stripes. Personality: Kind-hearted. Gender: Female.

Appearance: Short brown hair with hints of red. Red eyes. Clothing: A white collared shirt with a red tie. A black skirt. A green cardigan with one thick yellow stripe. Personality: Kind-hearted. Gender: Female.

Name: Horror Sans. Appearance: A short skeleton. The left side of his skull is cracked, and his left eye is red. He has no right eye. No hair. Clothing: A white shirt. A blue jacket hoodie with a fluffy grey hood. Black shorts with white stripes. Pink slippers. Weapon: A large axe. Personality: Cruel. Gender: Male. Member of the world's most terrifying trio, the "Murder Time Trio." Resembles Sans. An alternate version of Sans from the AU "Horrortale."

Name: Killer Sans. Appearance: A short skeleton. Black liquid streaks down from his eyes. He has no right or left eyes. No hair. Clothing: A black shirt. A red target-like circle on his stomach. A blue jacket hoodie with a fluffy grey hood. White shorts with black stripes. Blue slippers. Weapon: A knife. Personality: Insane. Gender: Male. Member of the world's most terrifying trio, the "Murder Time Trio." Resembles Sans. An alternate version of Sans from the AU "Killertale."