[@Leos Klien] Mmm....Captain of the Guard I would be fine with, but because we've already got someone who has the 'seasoned veteran' role, I'd have to say no for narrative purposes.  What I can recommend for ya' would be what Ambra said, where you could be part of the lower ranking guards from a nearby town that just so happens to get recruited into the party due to an encounter with some bandits in said town?  You could show some skill during the events that convinces Eli that he would make a good member of the group?  I'm not too good at making suggestions IMO, though.  I'd listen to Sol more if you ask me, mate.