"Yes, I think we should. I should be able to handle his rock wall just fine." Rough as it is, there should be plenty of hand- and foot-holds. And she still has her shield, if she needs to deflect rocks. She's hoping she won't have to; if they can be sneaky enough, she should be able to get pretty close before she's noticed.

"How shall we signal to each other?" Bird whistles? That could possibly work, unless she's got another idea.