Peridot can't help but frown at his initial reluctance, because come on, he'll send her in there but he's not willing to stick his own neck out?

...But he concedes in the end, and that's enough for her. She nods, grinning weakly and looking relieved at first, before slipping back into a frowns. "So uhhh. How do we do that, then?" she coughs, fidgeting awkwardly. Shadow travel is new to her.