Sleeping Princess

Sleeping Princess (ねむり姫, Nemuri Hime) is a diamond that was kept in the Devil's Castle in the movie Dragon Ball: Sleeping Princess in Devil's Castle.

History
The demon Lucifer wants to use this diamond to power a cannon in his Devil's Castle in order to destroy the Sun. Unaware of the fact that the Sleeping Princess is a jewel, Master Roshi sends Goku and Krillin to retrieve it, thinking it is a pretty girl.