I am a huge fan of Steven Universe and I saw quite a few people making their own gems so I decided it was time I did one myself.

Her gem is basically what most magnets have in them. Her weapon is a SlingShot, but is tailored to her. She's not big on violence since if she does fight, it's as a last resort because the gems she uses for her slingshot are attracted to other gems. She can control who it goes to, but she can't control where it hits as its main objective is to crack the crystal.
She's fun loving, laid back, and easy to get along with. Her gem is located in her left eye, but instead of hindering her eye sight in fact helps her aim. She has the ability to absorb illness and injury into her gem. It doesn't hurt her, but it does hinder her ability to see with her gem.