"Although the Sen Hu Ancestor's lifespan is near its end and he suffers from Dao injuries, he is still a Demon Monarch. It's said that he received the favor of a certain Demon Venerable when young, and has deep reserves."
The Chaotic Demon Sea is guarded by four Demon Monarchs at the four corners, and disputes are constant.
Without some foundation, one might have died at another's hands long ago.
Hu Yi does not know Jiang Shu's strength; seeing him young, he guesses that Jiang Shu is probably a True Inheritor from a major Human Clan sect, with high cultivation but certainly not in the Realm of Vientiane.
Given their direction, Hu Yi can clearly see that Jiang Shu intends to kill the Sen Hu Ancestor. He fears Jiang Shu's youthful fervor may lead him to take advantage of a weakness, worrying in his heart.
