Dust!Sans

Sans is rationally insane; he is cruel, especially in the presence of a human. He sometimes feels very guilty for killing all the monsters, and especially for the death of his brother, who became his "ghost" (in fact, the Papyrus is nothing more than his hallucination). The skeleton often talks to him, but due to the fact that others cannot see him, it will seem to them that he is talking to himself.

A short skeleton with rather wide bones. He wears a blue jacket with a gray hood, put on his head so that no one can see him, and so that dust does not get on his face. There is no dust on black trousers up to the feet, unlike jackets and pink sneakers, on which it is present in large quantities. His left eye is blue, with a scarlet border, denoting justice, repainted because of determination. Sometimes you can see purple flames in Sans' eyes, depicting karma. 

bisexual

Sans

male

Sans has 19 LV(20 if you count his own);[4]
Sans says: "We're gonna have a MAD time!" (We're gonna have a MAD time!) when a person challenges him; According to the canon, Dusttale!Sansa is called Murder!Sansom (English Murder - murder), but Dust!Sans is also welcome; His clothes are covered with the dust of those he killed; In a calm state, Sans' pupils are white;
Sans prefers strong alcoholic beverages, such as vodka;
Sans is less lazy than its original counterpart;[5]
Sans does not change his clothes because they are not needed or difficult to access;[6]
A person can still spare, run away and use actions, but all this is useless against Sans,who thinks that a person is deceiving him After the events of Dusttale there were at least 10 ways of genocide (999 as a maximum).The Papyrus phantom is not a real ghost, but just a hallucination of Sans. As a consequence, he can't help Sans to defeat a human;

he's sorry he had to kill him. his ghost sees him - a tall skull flying in space, which can speak and change the expression of its face. A red scarf is wrapped around his nonexistent neck, and gloves are floating in the air, which can move in space without any help. the ghost is nothing more than a hallucination. Papyrus is similar in character to Sans - he wants to kill the player, asking Sans to end the man faster. Also, the phantom feels a strong aversion to the player.

he does not like him for the fact that he went through genocide more than ten times, which is why Sans had to arrange it himself in order to resist.

Sans has experienced hundreds of ways of Genocide and realized that it is useless to judge a person. Despite hundreds of resets, the skeleton gains a Determination that allows him to remember past timelines and stop all this madness. Sans decided to make a person tired of death, but their soul is too strong for a monster with 1 LV. To become stronger, the skeleton decided to sacrifice other monsters. Sans constantly felt great guilt, and the monsters he killed came to him in nightmares. However, the skeleton continued to kill others, and over time the guilt disappeared. At that moment, the only thing that mattered to him was trying to stop the man. His brother is the last monster that Sans didn't want to kill, but he sacrifices them too, reasoning that death by human hand would be worse for him. It was the last and strongest blow to the psyche of Sans, after which he went crazy and began to see the "ghost" of Papyrus, not giving the skeleton rest.

19-20

doesn't know about them

monster

Can summon sharp bones in the air. can summon dragon skulls that shoot burning white rays. These dragon skulls are called Gaster Blasters. can use telekinesis. the thing that undergoes telekinesis begins to glow blue. He often uses bones in the form of cold steel. He can teleport.