Well, he weren't noble by birth, he was adopted into it and rose the ranks in the army through his own power alone.

His world's one where your birth don't matter. It's not about your tribe, but what you're capable of as a person. He already took out the spineless bastard who was on the throne before this, and he's gonna tear down the church and all the other powers that reinforce the current hierarchy that oppresses tribes like us.

He's the one man with both the strength and conviction to make it happen.