Based off of the hit cartoon series "Steven Universe"  This character is just like any other gems, except, he has been created on Earth by the gems. His purpose is to be a guard and friend of the lonely Rhodonite, a gem that has traveled far to meet the Crystal Gems. Since Rhodonite's gem is in her right eye, she felt different. So then the gems forged Obsidian together and created Obsidian. To make up for her gem eye, the Crystal Gems put a gem in his left eye. Now he is the guard and lover of Rhodonite and when they fuse together they create Obsididite. A giant much like Opal, they have four arms and wields two nunchakus.