Kyosuke Date is the main character of The Soultaker series. After being stabbed in the heart by his dying mother, he manages to live somehow. Then, he finds out that he has a long lost twin sister named Runa. He later learns his mother stabbed him only to unlock the power of the soultaker, so he can protect himself and his sister from the Kirihara group. The Kirihara group is a powerful corporation that's trying to get there hands on Runa. Kyosuke's powers lets him transform into a superhuman mutant alien. Along with Shiro Mibu, and Komugi Nakahara, they try to get to Runa befour the Kirihara group does and find out more about Kysuke Date's family secrets. At fisrt Kysuke is kind but the more souls he takes the more cold-hearted he becomes. He even goes as far as to called himself The Devil.