Clef had been switching between books, which was the only reason that he was even aware that someone else was in the room. He stood on his stone, and used his Bending to send the book back to the shelf. He was about to fetch the next when he heard the - needlessly - tall person muttering. He was trying to work on his own issues about his height. Since coming to the train he was mostly okay with it. But seeing someone that tall out of nowhere brought back memories of that one Storm... Or maybe the laptop did that. Or...

He shook his head to clear it. Standing on his stone he wouldn't be eye level if the other stood, he estimated, but close at least. He took a breath spoke. "Is there some assistance that you needed?"

His desire to be helpful and his love for the library might have made him a good librarian. If he could have been bothered to notice anything when he was in the middle of a book, that was.