Relief he's alive is primary, really. He honestly scared the crap out of Roxas after taking that long to come back. Roxas was this close to pretty much telling Jabberwock he'd do anything to get him revived.

That's mixed with concern and sympathy, after seeing his childhood like that. Despite the fact that he found the rage and pain kind of overwhelming, he... he'd have been more o.O at Ace if those *weren't* his feelings at the situation. It's how Roxas himself would have felt. He isn't sure what he thinks of any of it, but I think some part of him made the 'Org XIII could have been this, for me,' analogy. KH is just not as brutal as Ace's canon, in some ways.

Ace, what are your feelings on Zero and Roxas's accidental snooping?