Nail is a short young man.
Nail was a young miner, which was why his foreman Iron Head allocated him less work.
Nail was assigned to control steam machine and warn everyone before exhausting it. He didn't notice foreman and scalded him by accident. He took injured miner and brought him to the field hospital.
Soon he left work at mines and joined First Army ranks. After Brian's knighting he was the only one of team who talked to him, calling him His Excellency though. Nail often spoke he talked with Roland.