I don't recall giving anyone permission to leave the ship.
[ Haruka's eye had been caught by someone who not only had the same basic idea as her, but who'd managed to actually find a hat with a feather (she wasn't so lucky). And since it's now late enough in the festivities that she's left Michiru to mingle and herself to prowl, well. How can she help but approach? ]
What's up? Someone so lovely shouldn't be standing alone.