Hitsugaya was used to those who didn't know him refusing to call him captain. She wasn't a shinigami, so he didn't expect it. What he also hadn't expected was her to offer any honorific at all. Someone respectful for once!

He nodded slightly, his face still cold as ice. "I am. You are Utena...and I am sorry, it is the only name I know you by. Is that your family or given name?"