Merry would have totally flirted with him, but not in a forceful way, if that makes sense. More of a 'I think you're attractive and if you show interest, I'll reciprocate' way. She may or may not have mentioned that she was a princess (depending on if it came up), and probably was very unlikely to mention the 'in exile due to matricide' short of something equally shocking from Sion.

Characters you considered apping?