Holy Terror Six-Star Evolve Star Gem

A diamond containing the purest power of the Astral, it can raise the star rank of the Senshi Duet Holy Terror.
You can give it to a Senshi via the "Give Gifts" button on the Senshi interface, and can raise the star rank up to six stars.
You must have a One-Star Senshi before you can give a gift, and you can only raise one star rank at a time. After evolving, the original star energy will be zeroed out.