The Underground Archive

Characters

The Underground is small enough that everyone knows everyone, and that closeness is most of why the story lands. Here's a field guide to who you'll meet, roughly in the order the mountain introduces them.

Pixel sprite of Frisk, a small human child in a striped sweater Human

Frisk

The silent protagonist, a human child who falls into the Underground through a hole on Mt. Ebott. Frisk never speaks and is barely described, because the game hands their choices to you — every act of mercy or violence in a run belongs to the player, not to a pre-written character.

Pixel sprite of Sans, a short skeleton in a blue hoodie Skeleton

Sans

A short, perpetually unbothered skeleton who tells bad jokes, sells hot dogs at suspiciously marked-up prices, and appears to know far more about resets and timelines than anyone else in the Underground. Easygoing right up until he isn't.

Pixel sprite of Papyrus, a tall skeleton in red boots and gloves Skeleton

Papyrus

Sans's younger brother: an aspiring Royal Guard member, enthusiastic puzzle designer, and cook of a spaghetti best described as "structurally ambitious." Papyrus wants nothing more than friends and a following, and is disarmingly kind about getting there.

Pixel sprite of Toriel, a tall white goat woman in a purple robe Boss Monster

Toriel

The caretaker of the Ruins, who finds Frisk shortly after they fall and offers a home, a butterscotch-cinnamon pie, and a very firm opinion about children leaving the only safe room in the Underground.

Pixel sprite of Undyne, a blue fish woman with red hair and armor Royal Guard

Undyne

Captain of the Royal Guard: fierce, loyal, and allergic to half-measures. She trains Papyrus, mentors Alphys, and treats the protection of monsterkind as a personal, unnegotiable duty.

Pixel sprite of Alphys, a yellow lizard woman in a lab coat Royal Scientist

Alphys

The Royal Scientist, responsible for the Core's power output, the Amalgamates hidden beneath the True Lab, and a string of anime recommendations. Brilliant, anxious, and quietly carrying more guilt than anyone lets on.

Pixel sprite of Asgore, a large horned goat king in golden armor Boss Monster

Asgore

King of the Underground and Toriel's estranged husband. Collector of human souls, keeper of a very large garden, and a man who has convinced himself that a war he never wanted is still worth finishing.

Pixel sprite of Flowey, a yellow flower with a smiling face ???

Flowey

The first face Frisk sees underground: a talking golden flower with a friendly tutorial and an unfriendly agenda. Flowey remembers every timeline that came before this one, and wants you to know it.

Pixel sprite of Mettaton in his boxy grey robot form Celebrity

Mettaton

Alphys's creation and the Underground's reigning entertainment robot: game shows, quiz nights, and a dramatic form change roughly when you least expect it. Fabulous by design, dangerous by request.