So I know the Red XIII discussion was a couple pages back, but I was reading over it and thinking about it/him, and...even in the original game, and definitely in the dastardly entity known as the "Compilation"...he is just one of those characters they created, and then didn't know what the fuck to do with. Considering he way he's introduced, along with the 'cut content' about the 'other' creatures (Cobalt 12, or whatever), I kind of get the impression that perhaps originally he was going to be another character tied to Shinra, almost in a Vincent-esque way...a kind of experiment, Frankenstein's monster, who then finds his own identity through his adventures and interactions with the group. Then, when they threw that out the window and left his story solely tied to Cosmo Canyon, that's what results in a lot of the oddities and sort of awkwardness as far as placing his character. The "Seto" sequence is moving, and one of my favorite parts of the game, but I kind of feel like the whole "last of his kind" bit (which is a FF series staple, I suppose) is pretty underdeveloped in this case and actually barely mentioned. Bugenhagen's his 'grandfather', but then not at all, everybody else in Cosmo Canyon is human, but nobody finds this strange or even acknowledges that outsiders might find it strange, Seto did what he did to protect the other inhabitants of the canyon, but then...all of the rest of the "Nanakis" died...anyway?? Some of the moments I find most exciting with his character also feel like either hangovers from removed plot elements, or just things that don't get explored ("My tattoo is 13...am I going to go mad too?"). It just kind of feels like they weren't sure which direction to take his character compared to most of the others, so they just...didn't? I realize I'm not being very specific here, but I guess what I'm trying to get at is, this is one character where I'd be happy to see some outright re-writes.
