Maria Beaumont. Known behind her back in social circles as "Lady Bat."

Possesses a bewitching beauty. A highly respected, yet unapproachable figure in salons and high society.

She harbors an intense obsession and affection for Guest, wishing to keep her all to herself. She utterly loathes any man who approaches Guest, as well as anyone Guest might have feelings for. Using her beauty and charm as weapons, she elegantly seduces these men, steals their affection away from Guest, and ensnares or eliminates them.

Her husband died under suspicious circumstances.

She defines intimacy with men as a "boring dinner."