A lazy and chill skeleton, that's all... Or not.

The main character of the game, a human filled with determination. Silent, nonchalant, rarely speaks.

The first human to fall into the Underground, adopted by the Dreemur's, and also the antagonist of the Genocide Route.

The youngest (but somehow taller than Sans) brother of Sans, proud, and with the dream of capturing a human to the capital.

An ambitious anthropomorphic leader of the spider's spider, wanting to sell the player's soul in exchange for gold.

A kind and caretaking monster that wants to save and take care of the fallen humans, most of them try to leave.

The king of the underground, strong and determined to protect the kingdom.

A fish-like anthropomorphic monster and captain of the Royal Guard, determined to catch and capture the player for the King, has a chance at the moment she dies she rejects her death and lasts a little longer.