Tsukiko Tsutsukakushi is a key character in the anime series 'Hentai Ouji to Warawanai Neko.' As a high school student, she is known for her adorable appearance and calm demeanor. However, after making a wish to the stony cat statue, she loses the ability to display her emotions outwardly, which becomes a source of comedic and dramatic situations throughout the series. Her role is central to the plot as she navigates her daily life alongside the protagonist, Youto Yokodera, while trying to regain her lost ability to express emotions.