JTTM Diancie

Diancie is the Goddess of Fairies and had been intrigued by emotions. She had studied the draining of energy in the multiverse and realized that Yveltal feeds off that energy. The problem, however, was that this energy was running out and soon destruction of several worlds would be require to sate Yveltal’s hunger. So, she devised a system where emotions can be converted into energy to feed Yveltal. She chose a race that was immortal, so as to ensure an infinite source of energy.

Unfortunately, while the creatures she gave the system to were immortal in the sense that they always have backups, they lacked in emotions and morals. They took her system and modified it, allowing them to crystallize souls and have emotions cloud it to the point of the souls breaking and corrupting. They then took it to another world and handed it to humans, particularly young girls, and tricked them into a cycle of death and abuse.

Diancie was devastated that these creatures, the Incubators, could abuse her system like this. When war broke out because of massive groups of people declaring the Incubators as the enemy for their crimes against humanity, people eventually found her out to be the Goddess responsible for handing the system to the Incubators. She fled the multiverse, only to be captured by scientists and experimented upon. However, this gave humanity her Multiversal Gift: Shards.

Shards, to sum it all up, are small, crystallized souls of people which act more as backup copies when used correctly, like placing the Shard in a replica mannequin. However, its side effect gets used more often, as the Shards can be embedded into other people and thus are able to gain their powers, with the risk of becoming possessed by them or even having the two personalities merge into a single, inseparable entity.