This is indirect characterization because it shows the personality of a character.
There are five different methods of indirectly characterizing a character. Think of the mnemonic STEAL : S peech T houghts E ffects towards other characters A ctions and L ooks. The last one Looks is of importance to us. What the character looks like and how he dresses tells us about the personality of the character. He wore a fustian tunic stained and dark for example could tell us that this man is very hard working as fustian was commonly worn by workers during the 19th century.