Red Hair Pieces
Act 1 - Usagi, Sailor Moon (manga)
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.
- These were the only parts of Sailor Moon's costume to remain the same through her various forms and throughout all versions of the franchise.