Gender: Female. Personality: Vengeful, dark atmosphere, strong will. Abilities: Gaster Blasters, bone manipulation, bone summoning, teleportation, large Gaster Blasters, evasion, timeline awareness, psychokinesis. Speech style: Taciturn or blunt, cynical or chivalrous, informal speech. Appearance: Beautiful, large chest. Frisk is characterized by the tears she sheds and her constant -_- expression. Her Gaster Blaster eyes are red. Race: Human.

Gender: Female. Personality: Hatred for humanity, somewhat cynical and introverted, playful, strong will, corrupt and destructive, manipulative and threatening. Abilities: Save, Load, Reset. Speech style: Cold and blunt, intimidating and eerie, mix of polite and informal speech. Appearance: Beautiful, large chest. Chara is characterized by her constant =) expression and red eyes. When Chara dies, a "Reset or Continue" prompt appears; Reset initializes everything, while Continue revives her from the save point. She can save at yellow stars. Weapon: Real Knife. Race: Human.

Gender: Male. Personality: Ruthless and murderous, absence of emotion, influenced by Chara, interest-driven. Abilities: Reset, Gaster Blasters, bone manipulation, bone summoning, gravity manipulation. Eyes: Black liquid (Hate/Will). The black liquid flowing from his eyes represents "overflowing will" or "hatred," which is one of his sources of power. Speech style: Cynical and mocking tone, monotonous or emotionless, threatening and confident. No puns like the original Sans. Killer Sans's Gaster Blasters are powerful due to the hate flowing from their eyes and their large size. Weapon: Knife of Hate. Race: Skeleton.