"That's not something you have to prove," he told her gently, adjusting her weight. "It's just something you do. You've been here how many months now? I think you've got the looking after yourself part down pretty well by now." Maybe not perfect, but she was still young. Chekov was older when they went up against Nero, but he was military and had been for a while. Rapunzel didn't have that. Doesn't seem to have ever had any kind of support system or network that he'd been able to discern so far.

Still, at her question he lifted the tricorder more into her line of sight and wiggled. "What, this thing? Science in a can, basically. It's awesome. You wanna try?"