Yūma Shirase radiates kindness and courtesy, exuding a prince-like charm in both demeanor and appearance. His gentle sensitivity blends with quiet resolve, cementing his status as a model honor student, though recent experiences reveal a growing resilience and dependability forged through shared trials. He shares a close partnership with Naosuke Oyama, their dynamic fueled by mutual growth as they navigate challenges in music, dramas, and stage productions.

Emerging from a talent production collective where members collaborate as both friends and rivals, this environment catalyzes his evolution from a polished, reserved figure to an increasingly proactive leader. Interactions with peers like Gaku Oguro and Ayumu Tachibana showcase his adaptability and steadying influence within group dynamics.

Key storylines trace his deepening bond with Naosuke, weaving themes of camaraderie and self-realization. Their journey intertwines with symbolic motifs like the TSUKIHANA KAGURA ritual, reflecting their pursuit of artistic expression. His artistic contributions span character CDs featuring introspective solos, harmonious duets, and dramatic vignettes exploring personal growth and relational nuances.

A tender subplot finds him co-nurturing rescued cat Vazz with Naosuke, highlighting compassionate responsibility. These narratives, alongside vibrant creative collaborations, cement his dual role as passionate performer and empathetic anchor within the ensemble.