I happen to have the same exact personality as G'raha, and heavily relate to him, so that blows up your theory that he is "unrelatable." Look up the ENFP personality type and it fit's G'raha to a T, even the fact that they love adventuring and being around people. That happy-go-lucky personality is in a lot of media as well, not just FFXIV. Just because you don't know someone personally like that doesn't mean they don't exist.