Tamaki Shiraya —— 《Rock Is a Lady's Modesty》

A second-year student at Kuroyuri Girls' School, Oshin Girls' Academy's sister institution, and Otoha's childhood friend. Despite having a reputation as a skilled session musician in underground rock circles, she remained unaffiliated with any band—until reuniting with Otoha, when she joined her and Lilisa’s group as their bassist.