He is a Ruthless Seven Servant, you must defeat him in order to proceed The Inquisition Quest. Ushuriel is merciless and cruel even by demon standards. Like many other powerful demons, he worked his way up the demonic hierarchy through murder and slaughter. Unlike some of his more reckless brethren, he was thoughtful enough to win powerful allies and to ensure that his enemies had no chance for revenge before his next move for more power. Where other demons perished because they underestimated their enemies and overestimated themselves, Ushuriel was prepared for the confrontation and let others do the dirty work. After investing much time to examine his opponents' powers, his strikes were swift and precise. Early in his career, he became a follower of the Ruthless Seven and gained prestige and might in their shadow.