Of course he knew the significance. He wasn't fool enough to live here without knowing something about the place. And when your self-appointed guide talked about Aqua with every other breath, you couldn't help but to buy a book on Aqua just so you could tell her that you already knew what she was saying so could she please stop talking and just let him enjoy the peace?

It was perfectly normal.

That didn't change the fact that she was late though and the moment he sees her, happy and probably oblivious over the fact that she was late, he pushes aside the thought that she looked most like she was in her element when she was like that, to focus on a lecture on The Importance of Punctuality.