I think Lamia is somehow annoying with her jealousy and for acting always like a little kid, so I vote for Irlina. But the fact is that Irlina has yet to have a role in this manhwa >_>. She doesn't seem to be weak but we don't get to see her fight much. So I really hope she won't serve the sole purpose of being " someone to protect" . Anyway she still stays one of my favorite character, and her design is pretty great !