Mai (マイ, Mai) is Emperor Pilaf's female minion. She always works with Shu and, despite her intelligence, the two of them always manage to fail their objectives. She is a beautiful, calculating enemy who always resorts to weaponry and technology; her serious tone is a foil to Shu's comic personality.

Mai is a fairly tall woman with blue eyes and long black hair with bangs. She is often seen wearing red eye shadow and lipstick. Mai usually wears a teal trench coat with a red star insignia on each shoulder, a brown belt with a pistol holster attached to it from the right hip, beige slacks, and brown combat boots. Her overall uniform resembles that worn by Soviet secret agents portrayed in 1950's/60's spy films.

Mai is loyal to Emperor Pilaf and faithfully stays under his command throughout the entire series regardless of the situations. Though intelligent, Mai can be bumbling and forgetful. While she appears to be the most serious and reserved of the gang, she generally ends up playing the role of comedic relief alongside Shu and gets frightened easily. Like the rest of the Pilaf Gang, Mai displays the ability to comedically survive almost anything.

Though she is more serious than Pilaf or Shu, in the manga she is shown making tasteless jokes and even holds up a Poop Stick (a recurring gag in Dr. Slump) at one point causing Pilaf to get so irritated that he breaks the fourth wall.

It is revealed that she, along with Shu, were recruited by Emperor Pilaf from a want ad.