Shirona Tsukisuzu is a female character distinguished by her long, dark grey-green hair, styled with partial bangs and a green headband. Her attire features a green shawl draped over her uniform, black stockings, and a blue ribbon denoting her first-year status in Season 1, transitioning to second-year in Season 2—though the ribbon remains frequently concealed beneath the shawl during her initial year.

A versatile musician, she adeptly plays both the cello, with its subtly red-tinted body and unmodified design, and a violin visually reminiscent of the one owned by her older sister, Nachi Tsukisuzu, a former member of the same group. Shirona’s entry into the group unfolded when she approached their practice room to request membership, only to be momentarily mistaken for Nachi before clarifying their sibling bond.

Her discography spans solo pieces like *My Dearest Song* and collaborative works such as *Anepettan* and *Yume to yume ~ano hi no melody~* with Nachi, alongside group performances including *Get a Life!* and *Λlteration* featuring peers like Naru Hakobe and Nagi Kobotoke.

Central to her narrative is her relationship with Nachi, though specific character arcs across adaptations remain undefined in the provided material.