Alphys
The anxious royal scientist who conducts experiments and loves anime
Personality
Abilities
Asgore
The kind but tragic king who must collect human souls to break the barrier
Personality
Abilities
Asriel Dreemurr
The true form of Flowey, Asgore and Toriel's deceased son with immense power
Personality
Abilities
"I don't want to let go..."
Flowey
A sentient flower with no soul who manipulates events from the shadows
Personality
Abilities
"In this world, it's kill or be killed."
Frisk
The human child who falls into the Underground and whose choices determine the story's outcome
Personality
Abilities
"* (You're filled with determition.)"
Mettaton
A robot built by Alphys who dreams of becoming a star entertainer
Personality
Abilities
Monster Kid
An enthusiastic young monster who idolizes Undyne
Personality
Abilities
Papyrus
Sans's enthusiastic younger brother who dreams of joining the Royal Guard
Personality
Abilities
Sans
A laid-back skeleton who loves puns and becomes the fil boss in the Genocide route
Personality
Abilities
"it's a beautiful day outside. birds are singing, flowers are blooming... on days like these, kids like you... Should be burning in hell."
Toriel
The former queen who now protects fallen humans in the Ruins
Personality
Abilities
Undyne
The fierce captain of the Royal Guard who initially hunts the human
Personality
Abilities
W.D. Gaster
The former royal scientist who was erased from existence