Mayura Ichikawa manages the Miyagami Academy budget as treasurer and accountant for the Best Student Council. Her role plunges her into constant stress due to the council's property damage, unplanned parties, and reckless spending, often leaving her clutching a financial calculator or abacus in despair over ignored fiscal warnings. She sports short black hair secured by blue and yellow hairclips, gray eyes, and the standard Miyagami Academy uniform.

Fundamentally kind and deeply caring toward her friends, Mayura also pries into others' affairs. The pressures of safeguarding the budget fuel her stress, anger, and worry. A romantic relationship with Shimon Kurisu, a senior from a neighboring high school, ended when the Covert Squad exposed him as a "player" who dated Mayura solely for her council position while pursuing other Miyagami girls. To spare her feelings, the council fabricated a story about Shimon moving away for his parents' jobs, orchestrating the breakup. The council initially misunderstood her motives for dating Shimon, later learning she evaluated his character for a friend. This incident prompted the council to temporarily improve financial discipline and prioritize Mayura's happiness.

Her council interactions include Kanade Jinguuji, though specifics remain undefined. Following the failed romance and the council's supportive actions, Mayura strives to balance her diligent, overburdened institutional duties with personal connections amidst ongoing chaos.