Cuprite

Cuprite was a Crystal gem during the war against the diamonds, she alongside her friend Spectrolite survived the corruption attack thanks to Spectrolite power to make force shield, so they just lost the memory, one day they fused into Charoite, which had the power to make force fields and shoot electric beams out of her sword, after they fused they felt enourgh power to go for the diamonds, but they had not a way to get there, hopefully, there was a tower of water near of them, so using her electric powers she blasted herself to the tower, there she saw lapislázul, which was pissed, and well... blind, so lápiz made them into a Ball of water And threw them to space, in where they defuse, so Spectrolite, that was the only councious made a forcefield around both, and used the zero gravity to get them to homeworl, after getting there, they first went for Blue, but after Cuprite defeated the guards she was surprised by Blue with an energy throw which made her go flying like a meteorite that then was caught in a forcefield so she wouldn’t die, and so, they returned to earth using the same method, then on earth they fused again on Charoite, and used the sword to make a great hole in the ground, in which they made a temple with the form of Chariote so they Could rest In there, after During the movie they got that Steven made galactic peace, so they abandoned the temple and gutted it in half using Cuprite‘s sword, as she got to master it without being Charoite