I think I mean that at the beginning his suicidal tendencies are completely masked by his desire to Protect Others At All Cost, because he doesn't want to own up to his guilt throughout half the season. By the time he's able to say it aloud to Kallen, that does change.

I can't wait to see how he's doing in R2. @_@ I hope he's not in serious-face mode 24/7, that would kill his intricacies.