Mare Bello Fiore/Relationships

Ainz Ooal Gown
As the absolute ruler of Nazarick, Ainz has Mare's complete respect, admiration, and loyalty and he has pledged to serve him without hesitation. Originally, Mare believed that Ainz was a much scarier person but was quite shocked when he and his sister witnessed his compassionate side that he showed to his subordinates.

Aura Bella Fiora
Mare is the submissive one of the pair of twins, with Aura ordering him around.