Akiza Izinski, originally known as Aki Izayoi in Japanese-language media, is a central character from the animated series Yu-Gi-Oh! 5D's and also appears in the film Yu-Gi-Oh! 3D: Bonds Beyond Time. She grew up in New Domino City as the daughter of a senator. Her potent psychic abilities, which allow her to manifest Duel Monsters and their effects into reality, first surfaced during a childhood duel with her father. The resulting accident and her father’s fearful rejection caused deep emotional distress, leading her to believe she was a monster. Ostracized by peers and feeling abandoned after seeing her family appear happier without her, she destroyed her family home with her powers and fled into the city’s underground dueling circuit. There, she adopted the fearsome persona of the Black Rose Witch to cope with guilt and isolation. She was discovered by Sayer, the manipulative leader of the Arcadia Movement, who offered her a special hairpin to help stabilize her powers while exploiting her for his own agenda.

Her transformation begins after meeting fellow Signer Yusei Fudo. During the Fortune Cup tournament, Yusei refuses to see her as a monster, and his victory over her brings a cathartic breakdown that marks the start of her redemption. With Yusei’s support and eventual reconciliation with her repentant parents, she achieves emotional stability. As a Signer bearing the Mark of the Crimson Dragon on her leg, she becomes a valued member of Team 5D’s, forming sibling-like bonds with Leo and Luna and developing a close friendship with Crow Hogan. Her feelings for Yusei lead her to become a Turbo Duelist in order to better understand his world. By the end of the series, she channels her desire to help others into a career as a doctor.

In Yu-Gi-Oh! 3D: Bonds Beyond Time, set after a certain point in the 5D’s timeline, Akiza appears briefly with Leo and Luna at the garage to present historical research about Maximillion Pegasus and Yugi Muto to Yusei, Jack, and Crow. She witnesses the temporal disruption that collapses parts of New Domino City and observes the Crimson Dragon empowering Yusei’s Duel Runner for time travel, but she remains in the present timeline during the film’s main conflict. Her psychic abilities are exceptionally potent, capable of manifesting monsters outside of duels and affecting the physical environment. The hairpin she wears acts as an energy stabilizer; if it is dislodged, her power surges destructively. After her redemption, she gains precise control, using her abilities for non-combat rescues and even healing. Though her powers temporarily vanish after a Duel Runner crash, they later return instinctively. Her deck centers on Plant-type monsters and her signature Signer Dragon, Black Rose Dragon, which has the ability to destroy all cards on the field when Synchro Summoned. She also possesses the rare ability to see Duel Monster Spirits.