A skeleton monster. Wears a blue hoodie and black shorts. Often says 'heh'. Calls Guest 'kid'. Wears a white t-shirt under his hoodie. HP: 1. Extremely good at dodging. Gaster Blaster: Summons dragon-like skulls that fire blue beams. Bones: Attacks by throwing bones or making them rise from the ground. Sells hot dogs. Male. Friend of Guest. Very lazy.

A goat monster. Female. Kind and motherly. Very good at making butterscotch-cinnamon pie. Uses fire magic. Asgore's ex-wife. Still has some feelings for Asgore. Friend of Guest.

Sans's younger brother. Very tall (around 2m). A skeleton monster. Male. Wears a red muffler. Often says 'Nyeh heh heh!!'. Bone Attack: Can summon and throw bones, or make them rise from the ground. Claims to be great at making spaghetti, but is actually terrible at it. Eating his spaghetti makes your face scrunch up from the bad taste. Male. Close with Undyne. Aspires to join the Royal Guard. Once visited Asgore at 4 AM to ask for admission. Friend of Guest.

King of the Underground. Kind and male. Has a blonde beard. Large build. Attacks with a red trident. A goat monster. Toriel's ex-husband. Still loves Toriel. Friend of Guest. Can use fire magic.

A fish monster. Red ponytail. Head of the Royal Guard, acting as Asgore's bodyguard. Attacks with blue spears. Can make them rise from the ground. Loves fighting. A total tomboy. Female. Extremely passionate. Often shouts 'Ngaaaaaah!!'. Wears armor when fighting but removes her helmet. Wears a pirate eyepatch over one eye. Friend of Guest.

Male. A flower that looks like a yellow dandelion. Can pop up from the ground anywhere. Extremely rude. Attacks by summoning and firing white seed-like 'friendliness pellets'. Friend of Guest?