Tsukasa's mother is a piano teacher, and her father is a company executive.[1] As a child, Tsukasa was less confident and more indecisive. He often worried about his sister Saki and her painful condition. Due to her illness, he played the "Twinkle Twinkle Little Star" piano for many years and often rehearsed in the hope that Saki would return home soon and play with him. Ever since Tsukasa watched a performance of his favorite theater company as a child, he dreamed of becoming the star of a world-famous show and making the world smile. After Tsukasa failed an audition for the role of an artist at the Phoenix Wonderland theme park, Emu hired him to restore the dilapidated Wonderland to its former glory with incredible performances. Although Tsukasa doesn't remember it, he wanted to become a star to please his younger sister and parents. Over the years, his original motivation was forgotten and replaced with a more self—centered goal of just becoming famous. Throughout the main storyline, with the help of Miku and KAITO, he remembers the true reason for his passion. In her third year, Tsukasa is in the same class as Rui in 3rd grade.