Yuka is a karate champion who seeks to expand her horizons by becoming an idol. She was her karate teams’ team captain and was the ranking National Champion. Karate is a major aspect of her life, but she wants to be a master of dance and song as well. Interestingly, unlike other idols' hobbies, Yuka’s is never visually incorporated into her idol costumes. She's shown to wear a karate gi in her first card illustration (taken before she became an idol), but it's never been shown on stage. Instead, her trademark is her two ponytails, and she gets very embarrassed if she's seen with her hair down.