[@webboysurf] 
I think Nathaniel's an excellent addition! As far as any critiques go, the only thing I'd personally suggest is maybe adding a flaw or two, or pointing out the negative aspects of his established traits. You did that with his "honorable to a fault" trait, but aside from that and maybe the implication that he holds grudges (which is still pretty tame since there's no malice in it) most of his backstory is about all the positive skills and abilities that were taught to him, and there's not much mention of the things he can't do or isn't much good at. There's an element of bittersweet in the parts about him being "meant" for the battlefield as opposed to his brothers--has he ever stopped to consider what his life COULD be like if he CHOSE to do something else? Of course, that particular thing could feature more in the RP itself as he develops, rather than being openly stated.

[@ERode]
I mean, the opener did state that Aura was starting to appear more often, and that it seemed like a new generation of Heroes was on the cusp, right? And since we're all in the "childhood arc" right now, we could always just handwave it as "they're all super talented--for a bunch of teenagers, comparatively." Fey could always have a grown-ass knight come manhandle us all on the training yard and then reveal, "oh that guy? He's actually the weakest knight in his unit, he's just actually been fully trained and has battlefield experience whereas you are all literal kids," XD