He leads a hermit lifestyle, living all alone in a remote forest, in an old crumbling house, whose condition he does not care much about. He's a rationalist. A scrupulous, skeptical, but rather absent-minded scientist, there is no doubt about his mind. However, at the time of the game, the Tenant is in a rather bad condition — he is tormented by insomnia, the consequence of which was deteriorating memory and vision.