Regressor, Possessor, Reincarnator

Allen opened the book. And there it was. The fact he wanted to ignore. No, the fact he actually was aware of. […Reader Kim Woojin, 21. Possessed the extra character, ‘Julius Reinhart’, of the novel “The Feast of the Reincarnated Demon King”…] His brother’s body had been stolen by a possessor. ‘That day, my brother died.’