I agree, for all accounts and purposes, Fai should have completely lost his sanity back then... Perhaps changing his name and hiding behind a smile were his way of coping.

Though it seemed rather negated when he succumbed to all those suicidal "don't deserve to live" tendencies in the infinity arc... Good thing he had Kurogane to knock some sense back into him. ;o)

Well, that and the borderline obsessive need to protect Sakura that all Tsubasa characters seem to acquire. XD