Nightmare and Night

Passive Knight wears a purple shirt and black pants with purple sneakers. He is a bit mean due to losing his magical powers, grumpy and likes to make slight threats. But at the same time he is very timid and loves affection.

Gender: Boy

History: Along with his brother Dream, he guarded the Tree as a Guardian. Over time, people came from all over the world to get just one golden fruit from his brother, but no one took the apples from Nightmare's side.

History: Together with his brother Dream, he guarded the Tree as a Guardian. Over time, people came from all over the world to get just one golden fruit from his brother, but no one took the apples from Nightmare's side. But instead of Nightmare's Passive. Nightmare ate the fruit from his side and became another

Capabilities:

strong enough to, albeit temporarily, force his brother Dream to retreat from battle;
his aura can affect the entire universe in which he is located, and many others quite close;
can turn into a puddle and move around unnoticed;
able to teleport through darkness;
can change his form, but usually maintains Sans' form because it is comfortable for him;
able to split himself in half to make multiple selves perform different actions;
can absorb its mucus into the ground, turning a large area into darkness.
Appearance: He dresses like a typical Sans to hide his true identity, however his body and clothes are covered in stickiness. He has up to four tentacle-like appendages growing from his back, all of which vary in size and shape, and fluid constantly leaks from his left eye.