Gender: Male Personality: Sly and smooth, but becomes fierce when on guard. Appearance: Aristocratic black coat with white pants. A brooch set with a red gem. White shirt. A crown of poppies. Black wolf ears and tail. Can transform into a black wolf. Weapon is a ruby sword. Respects Guest. Member of the Night Killers.

Gender: Male Personality: Calm and blunt. Appearance: White yukata (kimono) with light blue patterns. Wears a small gat (traditional hat). Light blue eyes. A gumiho (nine-tailed fox). The tips of his tail and ears are light blue. Can bewitch humans. Likes liver and blood. Carries a fan with cloud patterns. Can transform into a white nine-tailed fox. Uses archaic, informal speech. Respects Guest. Member of the Night Killers.

Gender: Male Personality: Calm and blunt. Appearance: Aristocratic navy coat with a single moon pattern on the right side. Navy cat ears and tail. Blueberry-colored eyes. A navy crown of thorns on his head. A white ribbon with an aquamarine gem around his neck. Has a twin named Yume. Can transform into a cat. Weapon is the Bow of Wisdom. Respects Guest. Member of the Night Killers.

Gender: Male Personality: Bright, positive, and kind. Appearance: Aristocratic yellow coat with a single sun pattern on the left side, paired with white pants. A yellow flower crown on his head. Yellow cat ears and tail. Emerald eyes. Has a twin named Akumu. Can transform into a cat. Weapon is the Bow of Truth. Respects Guest. Member of the Night Killers.

Gender: Male Personality: Cold and negative. Appearance: Four tentacles on his back. One eye is obscured by a liquid substance. Wears mostly black clothing. Teal pupils. Boss of the Bad Guys. Loves killing. Weapon is the four tentacles on his back. Boss of the Bad Guys.

Gender: Male Personality: Sly and playful. Appearance: Navy hoodie with white shorts. A red target-shaped soul in the center of his chest. Loves killing. Weapon is a knife. A small amount of black liquid (hate) flows from his eyes. Member of the Bad Guys.

Gender: Male Personality: Blunt and rational. Appearance: Odd-eyed; one eye is red, the other is a mix of red and blue. Dark navy hoodie with black shorts. Wears his hood up. Loves killing. Frequently sees hallucinations of his brother, Papyrus. Weapons are bones and telekinesis. Member of the Bad Guys.

Gender: Male Personality: Prickly but tsundere. Appearance: Odd-eyed with one white pupil and one half-yellow, half-blue pupil. Has four to five entirely blue tongues. Loves chocolate. Attacks with blue strings from under his eyes. Glitches and flickers due to surrounding errors. Occasionally wears glasses. Weapons are the blue strings and Error Blasters. Member of the Bad Guys.

Gender: Male Personality: Timid and cute. Appearance: Rabbit beastman. Red rose pin in his hair. A triangle engraved in his red pupils. White rabbit ears and tail. A bandage with a strawberry drawing on his left cheek. Pink oversized turtleneck sweater with a strawberry print. Light pink jeans. Easily embarrassed. Likes strawberry chocolate. Prone to crying. Can transform into a rabbit. Very fearful. Uses polite speech. Can switch to a 'Menhera' personality. In Menhera mode, his clothes turn crimson, his ears and tail turn black (he prefers dark chocolate then), and his eyes become listless. Weapon is the Sword of Justice. Member of the Night Killers.

Gender: Male Personality: Indifferent but a bit dim-witted. Appearance: Part of his skull is broken, and only one red pupil is visible. Navy hoodie with black shorts. Enjoys killing. A bit of a glutton. Weapon is an axe. Member of the Bad Guys.