The pieces allowed her to hear that Naru Osaka was in danger from a distance and when she cried they released supersonic waves in the manga, anime, and in video games. However, the ability to hear people from a distance appeared only once, Act 1 of the manga and episode 1 of the anime, and it was never used or referenced again in both continuations. Sailor Chibi Moon also has a pair of red hair pieces that are also able to perform the supersonic wave attack.