Rock and Roll Madness 4-Star Evolution Gem

The diamond, imbued with the purest power of the astral realm, can be used to enhance the star tier of Senshi "<Rock and Roll Madness> Hana."
It can be gifted to Senshi through the "Gift" button in the Senshi interface, allowing their star tier to be raised up to 4-Star.
You must possess a 1-Star Senshi before gifting, and only one star tier can be upgraded at a time. After advancement, the existing Star Energy will reset to zero.