Mare Bello Fiore is a dark elf and one of the twin Floor Guardians on the sixth Floor of the Great Tomb of Nazarick. Mare is the twin brother of Aura Bella Fiora. Alongside his sister, he was created by Bukubukuchagama.Mare is a child with dark skin and pointed ears, a signature trait of the dark elves. He has golden hair and heterochromia, his right eye is blue and his left eye is green.
He wears a blue dragon scale leather full-body suit, covered by a white and gold vest embroidered with the sigil of Ainz Ooal Gown and a forest green-leaf cloak. Below, he has a matching short white skirt exposing his thighs, and on his neck is an acorn necklace emitting silver light. His slender hands are donned with shiny white silk gloves and he wields a twisted black wooden staff.
People outside of Nazarick always mistake him for a girl, due to how he looks appearance-wise and the clothing he mainly wears.Mare was created to be the brother of Aura by his creator Bukubukuchagama. The reason why Mare is so submissive to Aura stems from how his creator wants that sibling-type relationship to be. Since she apparently believed that the younger brother should obey the elder sister, it was Mare's duty to listen and heed the words of Aura even when they are partnered and paired together during missions assigned by Ainz. (Gag between Peroroncino and Bukubukuchagama).
Whenever they had to visit the other Floor Guardians for fun or do other things, Mare and his sister would always inform one another where they were headed. That was because the two are assigned to guard their Floor together by order of the Supreme Beings.