Mario, labelled "The Red-Clad Plumber," is a completely laid-back and unworried 18-year-old-20-year-old guppy, and that is why people like to hang with him. He is best friends with Sonjay and has feelings for Sonja.
Mario has peachy-tannish-brown skin, bluey-blackish-navy eyes, brown-purple-pink-green-blue-yellow-lavender hair, a black-purple-black-orange-blonde-red moustache and a blue-yellow-brown-pink-sepia-chestnut, overalls-patterned tail. He can never leave the house without his red cap that is usually printed with a white circle with a red capital 'M'.
- Mario is named after and isn't to be confused with the Nintendo character himself, whatsoever.