He is a young man with a slender body and a black mole under his right eye. His usual outfit is a neck chocker, a red track jacket were his sleeves is cuffed, he got bandaged both of his forearms, brown pants were tucked in the socks and black shoes.
Dust has a very similar demeanor to Kazuma, especially in regards to their perverseness and laziness. He is also famous for his delinquent behavior in Axel and has accumulated debts with multiple people including his own party members. He has gotten himself thrown into jail many times simply because it was better than being outside, not minding his criminal record much.
According to Vanir's insight, Dust is not his real name.
Dust is a main character in the Kyakkou spin off series.
Dust is suspected to be the powerful run-away Dragon Knight spear user who kidnapped his kingdom's princess to fulfil her wish of an adventurers life for the following reasons:
He claims to already have a princess
He was seen by Megumin demonstrating an overwhelming and well-practiced spear technique to a group of rookies he saw practicing the spear. Chris also mentioned that his current form and posture suggests that he's forcefully trying to change his entire fighting style
He owns an old -albeit good quality- helmet which he sold in order to pay off his debt in a shop and buy Mitsurugi's Gram at the same time. The fact that he owned and used a helmet of such value strongly suggests that his previous job was that of a Knight.
The point of his spear skills was all but confirmed when, in the first novel of his own spin off, he reminisces about how in the past he was an exceptionally talented spear fighter