Aiko Mikami transfers into PK Academy during the characters' second year. Her exceptional physical beauty earns immediate recognition, establishing her as a prominent class figure. This presence directly challenges Kokomi Teruhashi's standing as the school's most beautiful girl. Mikami exudes self-assurance regarding her appearance and enjoys the resulting attention. She actively engages in the rivalry with Teruhashi, openly acknowledging it and often aiming to surpass her in matters tied to beauty and popularity. These interactions frequently unsettle Teruhashi, igniting competitive responses and revealing Teruhashi's underlying insecurities. Mikami's central role revolves around serving as Teruhashi's rival. Their interactions consistently showcase this competition, focusing on Teruhashi's reactions. The narrative does not delve into Mikami's internal motivations or background beyond her surface confidence. Mikami remains consistent throughout her appearances, steadfastly embodying the role of the beautiful, self-assured rival. No significant personal development, detailed backstory, or exploration of her life outside the rivalry with Teruhashi is presented.