Genial Goddess 4-Star Evolution Gem

A diamond imbued with the purest power of the Astral Realm, capable of increasing the star rank of Senshi "<Genial Goddess> Riyu".
Can be gifted to a Senshi via the "Give Gift" button in the Senshi interface, up to a maximum of 4 stars.
You must own a 1-star Senshi before gifting, and each gift increases the star level by one. After advancement, existing Star Energy will be reset to zero.