User blog comment:Xilinoc/Ch. 586 - The Headless Star 5/@comment-4794735-20140625094334/@comment-5398287-20140625094615

Well, it's been pretty heavily implied that he isn't. Haschwalth pointed out that it's pretty obvious he's there to avenge his mother, but he can't really do anything because all eyes are on him and he drank Yhwach's blood. So at this point, I think he's just trying to protect Ichigo by putting up a ruse and pushing him away.