Irie, whose full name is Ayaka Irie, is a notable character who appears from the beginning of the story. She is a third-year student at the high school that serves as a central setting, identifiable by the blue ribbon she wears. Her appearance is marked by a cool and composed demeanor, and she has short purple hair.

Within the school, Irie is a member of the student council, a position she holds alongside her role as an operative of the Celabrum. Her combat role is that of a bridge crew member, and her Celabrum icon displays the name Ayaka. However, her history is far more extensive than her current position suggests. It is revealed that she originates from the Shizuoka server and was formerly a Wizard. In this capacity, she fought alongside Hayato Kuroshio as the Wizard piloting the Zegapain he commanded.

Like Kuroshio, Irie was forced to retire from active front-line combat due to damage sustained to her phantom data. This shared trauma and history contribute significantly to her motivations and her close association with Kuroshio, with whom she is often seen. Their relationship is defined as a deep bond between comrades who share a difficult past, but there do not appear to be any romantic feelings between them. Beyond this partnership, she also has a history of serving under Commander Isola at some point in her career.

Throughout the story, Irie primarily fulfills a supportive role, using her experience and cool-headed judgment to assist from a command or bridge position rather than on the battlefield as a direct combatant. Her development involves coming to terms with her past as a Wizard and her current status, operating alongside others who have endured similar losses and trauma from previous battles. Her notable abilities are tied to her function as a Celabrum, specifically in serving as a bridge operator, though her extensive past experience as a frontline Wizard indicates a high level of combat proficiency that she no longer regularly employs.