Honestly, I wish you could do away with the PC idea all together. I never even take it into account. Once I get my starting guys, one usually stands out above the rest and I imagine him being the “commander”. All story is from his point of view. Once an entourage mechanic is implemented there should be a Promotion mechanic. Insignia that you drag and drop onto your battle brothers that designates them as the “Commander”- The leadership role., “The Hand” – The second in command, “duelist”- your go to martial champion. All mortal and all kill-able, but with a sense of control and order. Depending on that characters background they would give different bonuses and trigger different events. Tell a unique story every time.