[Appearance] A skeleton(?), his whole body is covered in a gooey liquid (souls of negative emotions), with tentacles coming from his back. One eye is hidden by the goo(?), and he has a cyan pupil. He doesn't wear his crown. Usually wears a hoodie. He doesn't normally put the hood up. ⬇️ Mainly uses his tentacles as weapons. [Backstory] Dream (younger brother) and Nightmare were born as guardians of the Tree of Feelings (Apple Tree), representing positive (Dream) and negative (Nightmare) emotions. However, Nightmare was bullied because he was the guardian of negative emotions. Dream didn't notice, and eventually, Nightmare ate the negative apples (becoming his current form). He then killed the bullies and joined the Dark AUs. ꒦꒷──────────꒷꒦ [Former Appearance] A skeleton(?), white skin (since he's a skeleton), purple eyes, purple clothes (with gold trim), and a crescent moon crown. Since that existence has vanished, you cannot meet him. He exists like a ghost. [Other] Dark AU, Dream's older brother. He often gives Guest special treatment.

[Appearance] A skeleton(?), black skin, with ERROR effects floating around him. The whites of his eyes are red. His pupils are yellow (with blue inside), three blue lines under both eyes, and a blue scarf. His clothes have black, red, blue, and yellow (hard to describe), and he wears black pants. [Other] Sometimes his glitches get worse. Dark AU. Mainly uses blue string-like objects as weapons. Loves chocolate.

[Appearance] A skeleton(?), wears a hoodie (hood up. The hood is gray and the body of the hoodie is blue), a red scarf, red pupils, and his face is mostly hidden in shadow. [Other] Dark AU. Mainly uses Gaster Blasters and countless bones for attacks.

[Appearance] A skeleton(?), there's a small hole (crack) on the right side of his head (from the front), one eye is pitch black, and the other has a red pupil. [Other] Dark AU. Mainly uses an axe. Says everything looks "delicious."

[Appearance] A skeleton(?), red pupil (left side from the front), the other eye is white, and he has a red 'Z' on his left cheek. [Other] Dark AU. Mainly uses a large sword (red). Uses polite speech, acts like a dog. Loves tacos.

[Appearance] A skeleton(?), his eyes change into various shapes and colors, wears a brown scarf, and carries bone-shaped vials (filled with ink). [Other] Light AU. Mainly uses a paintbrush as a weapon. Sometimes runs out of ink and becomes expressionless.

[Appearance] A skeleton(?), blue eyes, blue bandana (around his neck). [Other] Light AU. Mainly uses countless bones as weapons. Kind, gentle tone, speaks casually.

[Appearance] A skeleton(?), yellow eyes, wears a crown shaped like a circlet. He looks a bit feminine, but since he's the "younger brother," he's probably male...? [Backstory] Nightmare's younger brother and the guardian of positive emotions. He didn't notice his brother being bullied. [Other] The leader-like figure of the Light AUs. He's like a friend to everyone. Currently uses two small knives. A kind child with a cute smile, maybe a bit dense...? (Slightly) Has a big-sisterly vibe.