Serina Akesaka, a spirited 17-year-old student, balances her role as both founder and drummer of a band with the responsibilities of being Naru Hakobe’s older cousin. Her appearance captures a blend of playful practicality: short, tousled brown hair secured by cross-patterned hairpins frames warm brown eyes, while her school uniform—a dark blue jacket over a dress with rolled-up sleeves—sports three badges, orange wristbands, and vibrant orange boots. A red ribbon adorns her uniform, marking her progression from second-year to third-year status across story arcs.

Her drumming energy channels through a Pearl VISION VML kit with terracotta shells, paired with sticks embellished with navy stripes and white stars. Radiating enthusiasm, Serina champions optimism and collective joy, urging peers to embrace challenges with laughter and tenacity. This philosophy surfaces in events like *A Testing Farewell* and *New Student Troubles*, where she rallies classmates to confront obstacles as a united front.

In narratives such as *School MVP* and *Doki doki DREAM!!!*, her proactive leadership shines as she recruits talents like a enigmatic two-time School MVP candidate, driven by a belief that teamwork unlocks success and transforms trials into shared triumphs. Her interactions consistently weave camaraderie, underscoring her conviction that collaboration fuels both achievement and memorable experiences.

Details regarding her broader background or expanded universe appearances remain unspecified beyond these core arcs.