Ruby Moon (ルビー・ムーン, Rubī Mūn) is a fictional character in Clamp's anime and manga series Cardcaptor Sakura. In the Japanese version, she is also known by her alias, Nakuru Akizuki (秋月 奈久留, Akizuki Nakuru). In the Japanese anime, she is voiced by Ryoka Yuzuki. In the English adaptation, she is voiced by Willow Johnson. Though she presents herself as female and prefers female clothing, she is biologically genderless.