That's the point. He wasn't meant to look overly dangerous, but he could kill hope in less than a minute if he was ordered to - and he would because he was a good soldier. Thankfully no one was around issuing that kind of order, but for the first time, the boy felt like maybe he her being somewhere else was safer for her. He wasn't sure why he seemed to care.
He noticed she took a step forward. He was impressed with her bravery. "Just is."