Kazukata might also be able to lend some help, though he may be the opposite of what you're looking for. Kazukata is very much a "help the realm" type guy, but he's got enough experience and heartbreak under his belt that he goes about it more calmly. He doesn't go around whacking primals, but he does try to do what good he can wherever he can. Also, Doman, lost just about everybody he ever knew, could probably bring the full weight of the world's cruelty home to Tali'ra without turning him into a complete nihilist, though he wouldn't share it too quickly. I don't know if it's the direction you want your character to go, but he'd probably try to nurture Tali'ra's heroic spirit while prepping him for all the dangers and horrors that come with the job.
All credit for the graphic to Benedict Whiteraven, you magnificent bastard.