As a hero, Xiya certainly could not be part of the Demon Clan.
Or to say, at the current point in time, he had yet to worship any high-dimensional demon, therefore it was impossible for him to be connected to the Demon Clan.
As for being possessed by the Lord of Dead Souls or anything of the sort, that was just Lynn's baseless pestering.
As the beloved protagonist of the gods, how could he be controlled mentally by a mere Fifth Rank Legend?
The reason he harbored such intense hatred and killing intent toward Lynn, he guessed, might be related to their identities.
Back at the Pantheon, Miss Witch had evaluated him as a foreign impurity incompatible with this world, with invisible corrective forces as his greatest enemy.
Because what he was doing was reversing the fates of the characters in the plot, leading their futures to deviate from the original story.
To some extent, as the incarnation of the world's will, Xiya Asolan certainly harbored such strong hatred toward him.