Yuzuki Shimada

Yuzuki Shimada (島田 柚姫 Shimada Yuzuki) is the cousin of Shōta Shizuka and the childhood friend to Shōta, Shinya Momotsuki and Rihito Sawaguchi. She secretly has a crush on Rihito and she is completely unaware of Shōta's crush on her; she reveals that she does care more about Shōta (in Chapter 113) and he is always number one in her thoughts, but she never thought of the possibility of romance; since they're cousins, she figured it was only natural that they'd always be together. She used to always refer to herself as "Yuu-chan" in an attempt to cling to the past, but she decides to "graduate" from this after she was rejected when she confessed her love to Rihito.

Trivia

 * The name Yuzuki means "grapefruit, pomelo, citrus fruit" (柚) (yuzu) and "princess" (姫) (ki).
 * Yuzuki's surname Shimada means "island" (島) (shima) and "field, rice paddy" (田) (da).