A queen? Royalty wasn't something Charlie had ever encountered. It was more shocking to hear Elsa was a queen than to see her make ice and snow from thin air. He already had magic in his life -of a sort- but royalty was something outside his realm of experience. Charlie wished he knew what was the appropriate response to someone announcing they ruled a kingdom. He settled for giving an awkward, jerking head-tilt, forward-bow-thing which mostly looked like he had appendicitis.
"Your Majesty. Grace? I don't know. Royal Highness? I've never met anyone royal before. I literally have no clue what to call you. It's times like these I wish I could summon the ghosts I needed to talk to so I could question a British monarch to make less of a jerk of myself. I'm sorry if I overstepped or anything. I didn't mean to since, umm, I didn't know? No offense."
He hoped Elsa didn't care he hadn't known she was a queen. They were both from other worlds. She had seemed friendly enough; she had enjoyed talking with him and the girl-spirit she couldn't even see. Elsa had been kinder to him than anyone at home in a long time. They were normal people who had known him before his brother had been lost in the car accident. It seemed strange to think a queen of a foreign land could be so kind when people who'd known him since he was a boy couldn't bear to even speak a greeting to him.
"You've been so nice. I don't want to offend you. I do know what you mean about missing home? I worry about Sam. He's my brother. He---died in a car accident, but he's still with me. I promised him to never leave him alone. What if he's alone thinking I've forgotten him? I try not to think too hard about it since I can't do anything other than worry which helps no one."