Lil' Arturo appears to be very short (almost about the height of an average 5-year-old) and has a Mexican-Spanish accent.
He has black hair that is brushed sideways that looks like he jumped out of a Picasso painting, a red-maroon short sleeved shirt with a white long sleeved one underneath, black pants, black shoes, rounded teeth, and a dark green nose like Bilg Billy's (only triangle shaped). He also has a rather prominent underbite. Arturo takes pride in his appearance -specifically his hair- and prefers to look rather "sharp".
According to Lil' Arturo, his father, Arturo de la Guerra (preferably Macho Arturo), 'went up the river' and his mother, Paz de la Guerra, has 'gone west', leaving him a foundling at the age of three. He was then forced to reside in Townsville's Foster Care system, where he was very poorly treated. Eventually, Arturo grouped up with a young rouge named Ace and his fellows, and together they ran away into the safety of Townsville's dump, thus soon evolving into The Gangreen Gang.
Lil' Arturo personally loves his switchblade-styled comb whom he refers to as “Maria Conchita Teresa Rosalita”, or simply “Maria” for short. Maria also was once the prize possession of his father, Macho Arturo. She was given to Arturo as something to remember him by, seconds before Macho Arturo was 'sent up the river' (meaning "sentenced to life imprisonment'). Ever since that day, Arturo has kept Maria very close to his heart.