Maypia Alexymetalia is a character from the anime Agent Aika. She is introduced as a highly skilled operative, holding the rank of a Class A spy who is employed by a government agency. Her primary mission is to gather intelligence on a mysterious entity known as the Lagu. To accomplish this, she infiltrates the army of a man named Hagen by adopting the disguise of a Black Delmo.

Physically, Maypia has red hair and blue eyes. Her most recognizable outfit is her Black Delmo disguise, which consists of a form-fitting black dress with a white collar and a red ribbon, paired with white thigh-high stockings and black high heels.

In the course of her undercover mission, she encounters Rion Aida and ends up following her. Maypia's situation becomes perilous when her employers abandon her, leaving her without support. She is subsequently rescued by Aika Sumeragi and her friends, an event that leads to a significant shift in her professional life. Following her rescue, Maypia decides to leave government service and becomes a freelance operative.

Her role in the story continues as she reappears to join Rion and her company in an assault on a Delmo base, aligning herself with the protagonists against a common enemy.