Ren actually looks a little surprised. Not an unpleasant surprise, either.

"Oh, nice."

She gets the sense it's not quite the same situation as Ren has, but hey, she's not judging.

"Be who you want to be. If someone has a problem with it, then that says way more about them than it does you or me."

Of course, she's sure that Izaya doesn't need to hear that sentiment, but still. She still wants to assert it.