Airi Sawagashi, a purple-haired girl with vibrant green eyes, sports twintails secured by a hair bobble and dons a school uniform accented by a tie and stockings. As a spirited classmate and friend to the central protagonists, she openly dismisses the potential of childhood friends becoming lovers, masking her own unresolved feelings for the male lead. Privately, she coins him the teasing moniker "Mamoron," oscillating between playful jabs and subtle gestures of affection. Her impatience with his emotional obliviousness often erupts into comedic physical outbursts.

True to her surname’s meaning—"noisy"—Airi radiates relentless energy and assertiveness, especially when disrupting romantic tensions among her peers. Her dramatic flair peaks with the exclamation, "Big news! It’s big news!", a trademark phrase punctuating her interventions.

Narrative arcs place her at the center of chaotic scenarios, such as a bowling outing that spirals into a clash with yakuza, inadvertently necessitating the male protagonist’s rescue. Though her affluent upbringing is acknowledged, specifics remain uncharted. Interactions with rivals and allies alike expose a competitive edge laced with jealousy, fueling both clashes and alliances.

Airi’s role persists as a steadfast source of comedic friction, her unspoken longing and sharp wit sparking minor conflicts and humor within the core storyline.