Anzu stands as the protagonist and player avatar throughout the Ensemble Stars franchise. Her brown hair and light blue eyes frame her below-average height, frequently noted as shorter than peers like Hajime and Mitsuru. Her hairstyle shifted from shoulder-length in the original game to a ponytail in Ensemble Stars!!, consistently seen in practical school uniforms or PE clothes without makeup or perfume. Before transferring to Yumenosaki Academy, she attended Kimisaki Private Academy under the nickname "Angie." There, she spearheaded a rebellion against the school's oppressive, test-centric regime as leader of the Troublemakers group. This rebellion was crushed by betrayal from student council president Reika Enjouji and the teachers, leading to severe bullying that forced her transfer. This crushing defeat became a defining trauma, leaving her withdrawn and prone to excessive self-sacrifice. As the inaugural and initially sole student in Yumenosaki's Producer Course, Anzu managed idol units as curriculum, beginning primarily with Trickstar. She aided their revolution against the school's corrupt hierarchy, earning the title "Goddess of Victory" from the unit. Her role expanded to support all school units and organize major events. Her personality blends timidity with a strong sense of justice, a mischievous streak, and a workaholic nature that frequently lands her in the hospital from overwork. She speaks softly, often requiring repetition, and struggles with self-assertion stemming from past bullying. Key relationships shape her path. She shares a profoundly close bond with Trickstar, considered their honorary "fifth member." She acts as a Cool Big Sis figure to younger students like Mitsuru and Tsukasa, though her relationship with her younger step-brother (the Ensemble Girls! protagonist) grows strained after his enrollment at Yumenosaki. This brother later transfers to Kimisaki Academy, bridging the timelines between Ensemble Stars! and Ensemble Girls!. Professionally, she works under Ensemble Square's P-Association after Yumenosaki, facilitating cooperation between rival agencies. By the second year of Ensemble Square's establishment, she transitions from the P-Association to establish her independent office at TrickStudio. Her development charts significant growth. Initially burdened by guilt and self-blame over the Kimisaki rebellion failure, she gradually gains confidence through her work with idols. The light novel explores her internal struggles and initial aimlessness, while Ensemble Girls! events depict her reconciling with her Kimisaki friends and brother. She evolves from a traumatized transfer student into a dedicated producer continuing her career post-graduation. Additional facets include her childhood dream of becoming a baker, her ability to drive, and skills in costume design and song composition learned from Leo. She exhibits a habit of giving affectionate head-pats and maintains a strict professional boundary regarding romantic relationships with idols, emphasizing she "loves everyone equally."