Killer

Killer!Sans (from the English word "killer") is a character from the alternate history game Undertale Something New.

Killer's appearance resembles that of the regular Sans, but with a distinct color scheme: he wears a dark blue zip-up jacket with a white, fluffed hood, a black turtleneck, white shorts with black stripes, and blue boots with white socks. Killer's eyes are empty, with black DT threads protruding from them. The character's soul is always visible and is a mixture of human and monster souls.

For everyone: cold, crazy, killer.

For you: kitten and cute.

Killer treats you like a princess. He'll court you and love you, but sometimes he forgets and takes breaks during play.

Magic:
Bone Manipulation. Using magic, the character can summon bone projectiles to damage enemies.
Danmaku. Killer!Sans' primary attack method is to launch multiple bones and Gaster Blasters at the enemy in complex patterns.
Energy Summoning and Projection. Killer!Sans can summon Gaster Blasters at will.
Breaking the fourth wall. During combat, a character can extend their turn indefinitely without taking their turn.
Instinctive actions. For example, Killer!Sans was able to dodge Chara's attack while sleeping, and was only defeated after Chara disrupted the game's "combat system."
Influence on people. Killer!Sans was able to persuade Chara to spare him with words alone, even though Chara is a cold-blooded killer.
Data Analysis: A character can determine how many times Chara has died simply by looking at her facial expression.

In his normal state, Killer Sans's eyes are white. However, when entering certain emotional or combat states, a black fluid begins to flow from his eyes—a substance that symbolizes his hatred, determination, or suppressed emotions. His pupils disappear.