History[]
Kurumi Killer[]
Mii and her friends make their first appearance when they see Tohka being upset that Shido isn't around. They then offer her the tickets that Tohka would later use on her date with Shido. During Shido's date with Kurumi, Mii and her friends chase them down, thinking that he is cheating on Tohka with Kurumi. However, they are distracted by Yoshino's sudden arrival.
Yamai Tempest[]
After Ellen takes a picture of Tohka, Origami, and Shido. Mii and her friends appear next to Ellen, and they compliment her on her camera. Then, after the airplane takes flight, they still follow Ellen while she is spying on Tohka. Later on, Mii and her friends enter the public bath, where they spot Tohka and compliments her good looks. While they approach her, Tohka acts in strange way in order to cover Shido, who is hiding behind her. However, the trio's continual advancement towards Tohka's location causes the latter to accidentally push Shido off the cliff and into the sea.
Later that night, the trio end up sharing the same room with Kaguya and Tohka. They start fawning over Kaguya's cute appearance and offer her some Pokey. After everyone is present, they engage in a pillow fight, which Ellen accidentally gets caught in the crossfire.
The next day, they call for Ellen to take a group picture of them at the beach. As Ellen tries to refuse, Mii and her friends eventually manage to persuade her to join in on the fun. They end up burying Ellen with sand right alongside Tonomachi, which causes the former to freak out. Later that night, Ellen trips and stumbles on one of the holes they made while speed digging, preventing the AST Wizard from catching up with Shido and Tohka.
Miku Lily[]
At the gymnasium of Raizen High School, she and Mai listen on as Ai gives a passionate speech about they overcoming their previous failure to win the Tenou festival and how they will surely seize victory this year. After seeing how Shido is able to attract the attention of Tohka, Origami, and the Yamai Sisters, she and her friends accept Shido's nomination of being the executive member for the Tenou festival.
After Shido is forced to crossdress as Shiori, Ai gets mad at Shido for forcing his duties as the executive member onto Shiori. Later, in the room they discuss about the loss of potential band members because of Ai's selfishness. Seeing Shido, Origami, and Tohka in the hallway, she orders her friends to capture them. Ultimately, the missing band member slots are replaced by Tohka and Origami. They also introduce the instruments that they will playing, with Mii playing the piano. After hearing that the drum is already taken, Tohka starts being upset, but is cheer up by the trio stating that they will give her the most sacred instrument: the tambourine
The trio also participates in Raizen High School's maid cafe, which attracts a great deal of customers. However, before the audition started, Miku had already brainwashed them so that they would not participate in Shido's group.
Miku Truth[]
After the conflict at the music stage, Ai and her friends end up becoming maids for Miku, who asks them for information about Shido's whereabouts. Right afterwards, they barge in on Miku fawning over the new Spirits she has acquired and tell the idol that Shido has come to them instead. Later on, Miku asks Ai and her friends about Shido's relationship to Tohka. At first they answer by telling Miku to not worry about Shido, since he is a frivolous person. However, Miku soon tells them that she hates girls who lie. As a result, they tell Miku the truth and say that they really don't know much about the two, but they do seem to be close. Along with the rest of the brainwashed people, Mii is freed from Miku's control after the incident at the DEM headquarter.
Natsumi Search[]
When Natsumi disguised herself as Shido, Mai and her friends saw "Shido" groping Tohka and angrily confronted him for being indecent. However, "Shido" instead began to flirt with Ai and even asked if he should kiss her. Shocked at the action, Mii and Mai are too taken aback to respond. After Ai collapsed, Mii and Mai try to confront on "Shido's" behavior, but "Shido" flips their skirts and escapes from the classroom.
Later on, when the real Shido came to class, the trio are ready to take revenge on him. When Shido states he doesn't know what he did to make Tohka cry, the trio grab Tohka away and scold Shido. When Origami recounts what Shido did (and wanting Shido to to the same thing to her), the trio blush, allowing a confused Shido to escape from class.
Much later on, Shido (under Reine's instructions) tries to arrange a date with Ai, but Mii and Mai come as well. The two then tell Shido that he already has Tohka and how Ai has a crush on Kashiwada. The trio then began to discuss and gossip more on Shido's relations with many girls, with Shido only able to try to deny their accusations. In the end, as Natsumi's game progresses, the trio is captured inside Natsumi's mirror. However, they are returned safe and sound after Shido wins Natsumi's game.
Natsumi Change[]
After being freed by Natsumi, Mai and her friends notice Tonomachi discussing with Shido about their disappearance. They briefly believe that they were chosen Sentai Rangers and wanted to "destroy the obscene monster" Shido. When Tonomachi mentions how Shido touch his thigh before, the trio believe that Shido was also into men and try to get their fujoshi classmate to "update" on that status.
Before anything could be made, homeroom begins with "children" coming to visit Shido. The trio notice them which causes an uproar that is made worse when Natsumi undressed Tohka, and the trio began to call Shido a lolicon. Natsumi then "made" Shido strip them and later, Tamae as well, prompting Shido to escape.
Itsuka Disaster[]
When Shido was losing control of his powers, he accidentally bumps into the trio again. Due to him being semi-conscious, Shido decides to make them fall in love with him and begins flirting. As a result, their impression towards Shido has worsened even more due to the actions done in his euphoric state.
Nia Creation[]
When Shido is eased to his condition, Reine told him to tell Ai, Mai, and Mii that he was just joking with them when he was flirting. Later on, they attend to Shido's Doujinshi store to help out with the sales, but they still regard Shido as a dangerous playboy.
Mukuro Planet[]
At the start of the new semester, the trio are gossiping to each other. During homeroom, Tamae is upset that she has finally reached her thirties and still hasn't found a husband yet. Ai tries to calm her down, but Tamae depressingly states that she wants to make a deal with the devil to cause a meteor to destroy the world.
Coincidentally, due to Mukuro's actions, meteors did indeed fell on school grounds, causing the class to see her as someone who actually made a deal with the devil.
Mukuro Family[]
When Mukuro sealed everyone's memories of him, Shido arrives to class and asks Ai, Mai and Mii if they remembered him. However, the trio thinks Shido was trying to flirt with them.
Kurumi Refrain[]
During Valentine's Day, the trio give out obligatory chocolates to their male classmates, curing them of their violently jealous state over Shido receiving huge amounts of chocolate.
Kurumi Ragnarok[]
On the morning of February 20th, Ai, Mai and Mii pass by Tonomachi on the way to school, who isn't dressed appropriately for the occasion. They inform Tonomachi of the rumor that Shido added another girl to his "zoo". Just as they finish talking, a Spacequake alarm sounds, forcing them to take shelter.
Mio Game Over[]
Moments after Mio is awakened, Shido is teleported away, finding himself inside the Spacequake shelter that Ai, Mai, Mii, Tonomachi and Tamae took refuge in. Noticing the absence of Tohka and Origami from their class, the trio agree to let Shido go. They restrain Tamae to prevent her from stopping Shido.
Mio True End[]
In the new timeline, Ai, Mai, Mii, Tonomachi and their teacher Tamae are cornered in their Raizen High School classroom by Bandersnatch units deployed by Isaac Westcott. Fortunately, Tohka arrives in time to save them.
Tohka Good End First Half[]
After Ellen becomes a teacher at Raizen High School and in deputy charge of homeroom for Shido's class, Ai, Mai and Mii again convey their enthusiasm for Ellen, deciding to take her out shopping for better clothes one day.