Tsuki Watanabe

Tsuki Watanabe is You Watanabe's cousin, and she is a second-year student who serves as the acting Student Council President at Numazu High School. Growing up in Italy, Tsuki is incredibly fluent in Italian.

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 transfer students be accepted into the new school.

(Source: Love Live! Wiki)