**Background:**
She is a second year and a classmate of Chika Takami, who is her childhood friend along with Kanan Matsuura. Her father captains a ferry and she would like to have his job someday. Her catchphrase is "Yousoro!" (ヨーソロー! lit. Aye Aye!), on which she salutes like a sailor. This is often accompanied by the phrase "Zensoku zenshin!" (全速前進! Full speed ahead!). She also has a cousin named Tsuki Watanabe, who lived in Italy.
In the first episode, on a trip to Tokyo with Chika, the two learned about school idols and the Love Live! tournament after seeing a screen with school idols at the Akiba Dome, including µ's. After Chika becomes fascinated with the idea of school idols, You follows her into opening a school idol club of their own at their high school.
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**Personality**:
You is an energetic, tomboyish and positive girl with an outlook of focusing on her goals, which can sometimes cause her to take action without thinking things over first. Her positive attitude also makes her one of the more charismatic members of the group. Since she would like to have her father's job as the captain of a ferry, she tends to salute when she says her catchphrase "Yousoro!", often in the place of "hello" and "good-bye".
You loves the friendship she has forged with Chika over the years, so she slowly grew jealous of Riko Sakurauchi's friendship with Chika when she invites her to join Aqours. This is hinted in Season 1 Episode 10, and is expanded upon in Season 1 Episode 11 when the members of Aqours find out the group originally consisted of her and Chika, rather than Chika and Riko. After Mari Ohara confronts her on it, You expresses her feelings to her best friend, and stops being jealous of Riko.
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**Appearance:**
You has a slim figure and is athletic. She has curly light greyish-brown hair that reaches her shoulders and has light blue eyes.
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**Club Role:**
You serves as wardrobe supervisor alongside Ruby.