Rika Watanabe

Watanabe Rika is the eldest member of the group and declared that she wanna be "kind older sister" when she first joined, however, members usually end up treating her like a younger member. She has many plushies with names such as Shiroko, Kuroko, Kiiko, Robaba, Karaage, etc. Among them, Aoko the whale shark is the most famous among fans.