I'd like to think so.

[It's a hope he needs to hold on to.]

... Twisted as he was, the man who did this to me was a genius. Most chimeras are unstable... their minds or bodies break down before long. The conflict between differing wills is too great. But rock golems are constructs built only to answer commands -- they have no will of their own. And blow demons are weak-minded creatures that lack the intelligence or malevolence of pure demons.

I believe he intentionally made this body in a way that ensured the human mind would remain intact.