Yuzuru Aoba is the older brother of Rinka Aoba, possessing pale skin, dark teal eyes, and distinctive indigo hair reaching mid-neck length. His hair flares out in sections, featuring thick bangs framing his face and a single curled cowlick. His personality is gentle, easily excited, kind, and scatterbrained. He often offers supportive tips to boost confidence, mirroring his colleague Meganee Akai, though she frequently chastises him during their work interactions.

As children, Yuzuru shared a close bond with Rinka. They frequently engaged in imaginative play, pretending to host their own Pri☆Channel broadcasts and recording each other. This activity ceased when Yuzuru began spending more time with other children, creating emotional distance that caused Rinka significant sadness. This childhood rift indirectly influenced Rinka's initial reluctance to become an idol, though their eventual reconciliation contributed to her overcoming stage fright.

Professionally, Yuzuru started as a cameraman at Prism Stone, where his scatterbrained tendencies frequently surfaced. He later transitioned to become the manager at Dear Crown, indicating career progression within the idol industry. Beyond family, he maintains connections with childhood friends Ayumi Hanakura and Takaya Saegusa, with whom he was part of a group called Arrows.

The etymology of his name reflects thematic elements: "Aoba" (青葉) combines "blue" (青) and "leaf" (葉), referencing his indigo hair color, consistent with other characters. "Yuzuru" (ユヅル) carries meanings like "bowstring" or "to concede." His full name functions as a pun on Masakazu Hishida, a director associated with the Pretty Rhythm series, using an alternative reading of the kanji for "Yuzuru" (譲). His family includes his father Kenzaburo Aoba, mother Junko Aoba, and younger sister Rinka.