Will give

Dust Sans' character can be described as follows:

Sans was originally comedic, but also apathetic towards life. He was laid-back and easy-going, but still showed interest in his friends and family.

zlodeifanon.fandom.com

After the reboots and genocide cycles made by Frisk, Sans' personality changed dramatically. He became careless, psychotic, and obsessed with killing people, doing everything he could to stop them. He also showed signs of schizophrenia, suffered from bouts of depression, and considered his actions useless.

the-rewrittenverse.fandom.com

After defeating the human and being mentored by the Watcher, Dust managed to regain most of his old personality. He is now as mischievous and considerate as he used to be. Despite this, he has given up his laziness, as he saw it as one of the reasons his universe went down.
Dust Sans is a skeletal monster from the alternate universe of DustTale.
t.me*

Some details of the character's appearance:

Clothes: A dark blue jacket with a grey hood, underneath which he wears a grey turtleneck sweater. On his legs are white striped trousers.
quasarverse-official-page.fandom.com
Eye color: left - red-blue, right - pure red.
t.me*
Hood: Dust always wears this to keep the dust from slain monsters from getting on his face.
t.me*
Features: clothes are covered with dust from killed monsters.
dustverseoffical.fandom.com
A more detailed description of Dust Sans's appearance can be found on the websites quasarverse-official-page.fandom.com, dustverseoffical.fandom.com and t.me.