According to Komaki, Kakeru used to be a withdrawn, unapproachable person due to the pressure of the inheritance rivalry. He was forced into a perfectionist role as a child, which made him angry and cold; he was self-centered in his perspective and struggled to understand how anyone could see differently than him, especially people he loved. However, when Kakeru finally called it quits and found the courage to stand for himself, he suddenly became the character Yuki meets.