Mai Waifu is a canon character who attends Akademi High School. She was the fifth character to be introduced as an Easter Egg student.
Mai has long pink hair. Her eyes cycle through the colours of the rainbow. Her uniform is dependent on the player's choice. Her bust size is 2.
Mai is a Loner. If a camera is pointed at her, she will hide her face. If she witnesses murder, she will run home and call the police.
Her student profile states that she is described by others as being "kawaii", "moe", and "deredere". Instead of socializing with anyone, Mai prefers to spend her time alone, fantasizing about her loved one.
Mai has sworn her heart to this person, who is an unknown game developer that lives overseas. She prefers to spend her time alone, fantasizing about them. It is implied that this person is YandereDev.
- Sometimes, Mai's hair will clip through her body.
- Mai's left eye will be grey while the other continues to cycle through the rainbow if she is kidnapped.
- When the warning was added to the game, it referenced Mai as a "busty pink-haired schoolgirl". YandereDev later removed the warning because he thought it was "cringey".
- While Mai has many admirers, she does not have any stalkers.
- Mai is a reference to YandereDev's joke appearance, where he stated he was a sixteen year old Japanese schoolgirl with large breasts, pink hair, and rainbow eyes.
- Her name is a pun on the phrase "mai waifu", which when translated means "my wife". In Japan, some husbands use this term to refer to their wives, however in Western cultures, it means a person's favourite character from an anime or manga who is female.
- Mai is stalked by Oka in the Gaming Club's stealth game.
- Mai will appear as a mindslave instead of Musume if the K key is pressed in the debug menu.
- There is a possibility that Mai may become a distraction for male students.