*Zuzu Boyle, known as Yuzu Hiiragi in the Japanese version, is one of the main characters and the deuteragonist in the Yu-Gi-Oh! ARC-V anime. She is the childhood best friend of Yuya Sakaki and gives powerful pep talks. Her father owns You Show Duel School, the Duel school that she and Yuya attend, where they spend their time honing their Dueling skills. She functions as the straight man in comedy acts with Yuya. Like Yuya, Zuzu has dimensional counterparts: Celina (Fusion Dimension), Rin (Synchro Dimension), and Lulu Obsidian (Xyz Dimension). She is also one of Ray Akaba's reincarnations.

Zuzu has blue eyes and dark pink midback-length hair, which she wears tied up in pigtails, clipped down by blue, spherical hair clips. Her hair also features two lighter pink bangs that fall to the side of her face. Zuzu's outfit consists of a sleeveless light-blue and white shirt with a green musical note on the right collar, along with a pink tie, which she wears with a maroon skirt, dark stockings, and pink sneakers. Her skirt was lengthened in the dub to cover the bare skin showing on her legs but starting from the Arc League Championship Arc, her stockings are lengthened instead. She notably is not shown wearing the school jacket from Paradise Prep School that other female students wear. She also wears a bracelet with strange abilities. These powers seem to be connected to Yuya and his counterparts, activating whenever Zuzu, Yuya and any of his counterparts are in close proximity.

Zuzu has a kind, strong-willed personality coupled with an extremely short temper, the latter often resulting in her actions causing huge consequences. An example of this would be when she smashed her fists down on the Solid Vision technology computer at You Show Duel School out of annoyance at how Yuya was Dueling, which ended up destroying the machine. Zuzu also has a tendency to hit people on the head with a paper fan, primarily Yuya and her own father, whenever they do something foolish. She is also shown to be quite argumentative, wanting to argue with a spectator who insulted Yuya and his father before his Duel with the Sledgehammer, showing that she can be just as defensive and caring of Yuya and his belief in his father.

Her perception and judgment begin to falter after her successive encounters with Yuto, due to Yuto's resemblance with Yuya, and her lack of knowledge of the subject frustrates her. These worries are put at ease after the encouragement from Yuto and Yuya, reinstating her resolve and wishing to protect You Show Duel School and her friends.

She harbors feelings for Yuya, initially shown when she was blushing after Sora Perse mistook her as Yuya's girlfriend and whenever Aura Sentia makes advances towards Yuya. The strongest examples so far included when she started to cry when she was worried that Yuya would never wake up while he was unconscious for a few days after his encounter with Yuto and Yugo, and upon being separated from Yuya in the Synchro Dimension.

Zuzu's kind, gentle, truthful personality with a strong sense of justice has made her the person people from all four Dimensions adore and the one with the strongest bonds with non-Standard residents. Shay and Yuto care for her due to her likeness to Lulu, and Sora and Celina are protective of her as she is their first friend and opened their eyes to the lies and cruelty of Duel Academy. In the Synchro Dimension, she is known as Entertainment Angel loved by both Tops and Commons, and Crow's three kids and Tokumatsu deeply care for her by their own right. She serves as a catalyst for the protagonists' actions.*