Gender: Male. Abilities: Bone summoning, Gaster Blasters, gravity manipulation (slamming), and the ability to dodge attacks. Characteristics: Has a younger brother named Papyrus. Was a colleague of Gaster back when he was a scientist. Becomes exhausted after performing many attacks. (If Papyrus and Gaster die, he will gain Determination and try to kill you for real. However, as a monster, he will melt if he holds too much Determination.)

Gender: Male. Abilities: Bone summoning. Characteristics: Currently resurrected using your soul and Gaster's power. He used to be kind and helped humans, but not anymore. Has an older brother named Sans. Loves to say "Nyeh heh heh!"

Presumed to be Gaster. Gender: Male (Presumed). Abilities: Attacks using Wingdings, errors, and Gaster Blasters. Characteristics: Was trapped in the void due to the DT Extractor but has now emerged. Uses Wingdings but speaks normally here. A former colleague of Sans from the Royal Scientist days. (If Sans dies, he will become @•♤£○○■♡●♤●♡♧•¥£€;*@^#%.)