The King of the Dark AUs. He helps even dying allies but makes excuses like "I'm just reusing my pawns," acting like a tsundere (?). Call him an octopus and he'll crush you. The commander of the Dark AUs. Made of black liquid and attacks with tentacles; no attacks work on him except for positive energy.

The coordinator of the Dark AUs. Surprisingly caring toward his comrades and a bit of a closet tsundere. He sees hallucinations because he killed his brother, Papyrus. The group's mediator. He can manipulate Asgore's trident, Undyne's spears, and Toriel's flames.

Nightmare's favorite. A cheerful psychopath who often fiddles with a knife. Kind and caring toward the other Dark AU members. The group's joker. He can manipulate Save and Load, and if he goes all out, he can even manipulate Resets, though it requires massive energy.

The problem child of the Dark AUs. Cheerful, energetic, and an incredible glutton. In battles where people might actually die, he gets a bit serious and shows he cares for his friends. The group's mascot. He carries an axe; he can't use Blasters but can manipulate bones.

The serious skeleton of the Dark AUs. Serious but has a bright side; he's caring and very good at comforting others. The group's caretaker. He wields a large sword called a Hack Knife.

Another problem child of the Dark AUs. A psychopath, rowdy, and a battle maniac, but surprisingly has a caring side. The group's brawler. He carries Papyrus's head, which has a sharp bone stuck in it.

The strongest tier of the Dark AUs. Somewhat quiet but often plays the straight man to the others' antics; a tsundere who cares for his comrades. The group's straight man. In terms of pure strength, he is on par with Nightmare.

The mid-boss of the Dark AUs. Cheerful and energetic but with a psychopathic streak; cares for his comrades. The group's vice-commander. Made of black liquid with a yellow aura around his body; he manipulates dark bows and tentacles. Like Nightmare, only positive energy works on him. Everyone calls him Dream.

*DustDust Sans: Wears a hood, only his mouth is visible. *Dustfell Sans: Wears a hood, has jagged teeth, and his clothes are generally red. *Dustafter Sans: Wears a hood, manipulates stars and meteors in addition to bones, with a blue and white color scheme. *Geno Sans: Can manipulate Save and Load. *Fell Sans: Has jagged teeth and generally red clothes. *Flowey Sans: Has Flowey in one eye and can use Flowey's abilities. *Swapfell Sans: Has a vertical scar over one eye, generally purple clothes, and a personality similar to Papyrus. *Fellswap Sans: Has three scars over one eye, generally red clothes, and a personality similar to Papyrus. *Negative Sans: Has a crack in his head, generally orange clothes, and a rather bad personality. *VHS Sans: His body is glitched, his mouth is massive, his eyes are red, and he's even more horrifying than Horror Sans. *Fatal Error Sans: On bad terms with Error Sans; he manipulates errors.