Manaka, a supporting character introduced in the series’ third season, is an anthropomorphic chinchilla distinguished by pale turquoise fur, light brown eyes, three whiskers lining each cheek, and a slender tail. Her attire features a white schoolgirl ensemble adorned with a white-and-pink plaid bow atop her head and a matching one accenting her dress, complemented by long white socks and shoes.

Initially portrayed as arrogant, impatient, and brash, she channels this intensity into her idol career as a core member of OTMGirls, displaying relentless work ethic and ambition. Her dynamic with Retsuko sparks gradual growth, evolving from dismissive friction to collaborative respect, marked by moments where she proactively defends Retsuko—wielding a modified baseball bat alongside bodyguards against threats like the Unhinged Fan or Masuo Ikari.

Her stage name echoes the Japanese term *man’naka* (“center”), mirroring her position as the group’s focal point during performances. Beyond idol duties, she balances a part-time role as a store clerk, though her personal history remains undefined.

Interpersonally, her bond with Retsuko deepens through shared challenges, blending casual outings with mutual support, unveiling empathy beneath her bold exterior. She clashes with traditionalists like Ton, bristling at his abacus use, reflecting her preference for efficiency and modern practices. Her narrative remains confined to the main series, with no expanded media detailed.