Yes that is Honoka from Love Live. It may not show well, but she is wearing a little pirate hat, and is saluting. I've been on this show since the first anime. I'm not really a big idol show fan, but I've enjoyed following these folks. Great that you're enjoying it. It's hardly thought provoking at all, though you may come across some things as you keep watching.
I'm looking for a dynamic contrast with the HE560s. I'm pretty sure I'll get it with the HD650s and the HD800s.