Mare Bello Fiore

The other guardian of the sixth floor of Nazarick, "Jungle."

His appearance is the same as his twin sister Aura, but due to the creator's playful nature, he has heterochromatic eyes in green and blue, opposite to his sister's color scheme. He is generally dressed in the same outfit but is made to wear a skirt, cross-dressing as a girl.

He is timid and cannot defy his sister, always appearing nervous and hesitant. However, Ainz has entrusted him with large-scale terrain alterations, indicating his high capability as a rear-guard magic caster. Sebas has remarked that his abilities rank second among the guardians. He is thoroughly indifferent to beings outside of Nazarick, especially enemies, towards whom he shows no mercy and remains emotionless, suggesting that his timid personality might be an act.