The protagonist and the first student to enroll in the Producer Course. Anzu is meant to be the player. She is characterized as a shy girl with a quiet voice, but is nonetheless hardworking.
In Ensemble Stars!, Anzu was the sole student in the producer course and managed the idols as part of her school activities. As of the Ensemble Stars!! timeline, she works with the idols as a member of the P-Association.
Players can change her name if desired.
Anzu is a girl with short, shoulder-length brown hair and light blue eyes. In the game, multiple characters imply that Anzu is of below average height, and Mitsuru notes that she is shorter than him. In the anime, she is shorter than Hajime.
During her second year, she wears a pink cardigan and Yumenosaki Academy's blue blazer over her Kimisaki Academy uniform, and wears tights. Although she wears a blue ribbon bow in the game, in the anime and the second manga, she wears a blue tie.
In Ensemble Stars!!, her hair is kept up in a ponytail.
Anzu is the default name for the player. It is possibly derived from the game's title, "Ensemble Stars!" (Ansanburu Sutaazu), taking the An from Ansanburu and the zu from Sutaazu.
Similarly, her nickname in Ensemble Girls! was Angie, taking the An from Ansanburu and the G from Garusu.
- Anzu is constantly noted to be a workaholic by the other characters, and, when given dialogue choices in minievents, she often remarks on how she'd like to have more work to do. This is likely meant to be an explanation for why she's involved with so many stories, as many stories happen concurrently.
- She's the older step-sister of the protagonist of Ensemble Girls!. They were confirmed to be step-siblings in the Ensemble Girls! story Sleeping Beauty.
- Before she transferred to Yumenosaki Academy, she was the president of the Tea Ceremony Club at her previous school, Kimisaki Academy.
- Anzu was supposed to transfer to the normal course, but for some reason transferred to the producer course instead.
- Anzu is not featured in the first manga adaptation or the stage plays. However, she is featured in the second manga adaptation, the novel, and the anime.
- Anzu's student records appear in the anime, but the text on them is blurred. Some fans believe the text under her birthday resembles the date October 8th (10/8). However, Anzu's birthday has not been confirmed by any official sources.
- Anzu's childhood dream was to be a baker.
- Aside from creating outfits and overseeing lives, Anzu has also composed songs. This is a skill she learned from Leo.
- Sora described her color as "His favorite shade of "light blue".