Pursuit of the Truth Soul of Negary The Dungeon Seeker Nidome no Yuusha The Void Wolf The Great Demon System
Mysterious Journey (it really depends on power. As a weak normal human, he was indifferent and sometimes nice, as a hardened martial artist he was a killer whenever attacked, as other kinds of powers he acquired in other worlds, he became ever more cruel and willing to experiment on anyone). His lives really shaped him, and there was the whole moral poison that was soul powers inherited from extinct assholes who plagued the setting's multiverse long ago and only left more momsters in their wake.