The Heartless

The Heartless are creatures born from the darkness in people’s hearts. When a person succumbs to the darkness within their own heart, their heart is overtaken by that darkness. It exits their body, and becomes a being of its own. The heartless are mostly unintelligent, and act on pure instinct, with the goal of attacking people and turning others into Heartless. There are however, rare exceptions. When a person willingly becomes a heartless, they have a chance at retaining their self-awareness, as is the case with Xehanort’s Hesrtless, Ansem. 

There are two main varieties of Heartless, Pureblood and Emblem. Pure blood Heartless are the ones brought about through natural means, while Emblem Heartless are created artificially, via Apprentice Xehanort’s (link to character needed) Heartless-creating machine.