Naples is a Yellow Mongoose, Cynictis penicillata. He's pretty much based off of me in real life, with only a few artistic liberties here and there. As such, he doesn't have a background story and his personality can be summed up as "however I'm feeling at any given moment" but I generally like him to look fierce and a bit theatrical.
When drawing Naples: feel free to make his markings more or less complex, even solid yellow is fine. Do not give him nipples or genitalia, ever.