Tsuki Watanabe

Tsuki Watanabe is a supporting character that appeared in Love Live! Sunshine!! The School Idol Movie Over The Rainbow. She is a third year student of Numazu High School (initially a second year student). She is You Watanabe's first cousin.

Background
Tsuki spent most of her childhood days in Italy. After which, she returned to Japan where she studied in high school.

She is a second year student who serves as the Student Council President at the new school where the transferees from Uranohoshi Girls' High School will be attending after they integrated from Seishin High School. When majority of the student body was reluctant to accept the transferees, Tsuki stepped up to help them settle in by helping Aqours.

Through their combined efforts, the student body eventually accepted their new schoolmates. Tsuki led her fellow students in helping a hand with Aqours' live show in Numazu.

Appearance
In her first appearance in the movie, Tsuki sports a tomboyish look, hiding her hair beneath a cap and wearing a coat and pants. Her cousin's friends—and to an extent the viewers—didn't realize that she's female until she removed her cap.

Despite her preference for this look, she sometimes wears skirts, like in her uniform and travel wear in Italy.

She has straight black hair that reaches her shoulders and purple eyes.

Personality
A dependable friend and fond of uniforms, Tsuki shares many qualities with her school idol cousin. Of the entire student body, she was the only one willing to help the transferees be accepted into the new school.

Having grown up in Italy, Tsuki is fluent in Italian.

Etymology

 * The name Tsuki means "moon" (月).
 * Both You Watanabe and Tsuki's kanji names are derived from the word "getsuyobi" (月曜日) or Monday. In a literal sense, it even translates to "moon day," as Tsuki's kanji also means "moon."
 * Tsuki's surname Watanabe means "transit, ford, ferry, cross, import, deliver, diameter, migrate" (渡) (wataru) and "environs, boundary, border, vicinity" (辺) (be).
 * Watanabe is is a common surname in Japan.

Notes & Trivia

 * Prior to the movie's release;
 * Tsuki had never appeared and had never been mentioned in any media.
 * Tsuki's gender was debated by the fanbase after her first appearance in her tomboyish attire, until the Hop? Stop? Nonstop! video clip uploaded in the series' official YouTube channel indirectly spoiled her true gender.
 * Tsuki's voice actress, Tomoyo Kurosawa, also voices Misaki Okusawa/Michelle from BanG Dream!, Kumiko Oumae from Hibike! Euphonium, and Amiya from the tower defense mobile game Arknights.
 * A recent update in School idol festival includes Tsuki as an SSR Support card, alongside Alisa and Misato.
 * Aside from this, Tsuki does not appear any of the main or event stories in School Idol Festival.
 * Tsuki does not have an official birthday. However, some fans have regarded her unofficial birthday to be January 4, as it is the day when the Love Live! Sunshine!! The School Idol Movie Over The Rainbow premiered in Japan.