[ They don't pick up on her bafflement, since they're too focused on the task at hand, and they pull her up a bigger boulder— watching both of their footing of course. ]

Huh. So something is weakening you... [ Could be the sirens, could be the island, could just be coincidence. There's no way to find out, so they shrug it off. ] It's probably best if you don't use it for now. Fainting is probably what those sirens want from you.

[ Y'know, so they can eat her and stuff. Once they're up on the bigger boulder, they try to usher her to rest, expression relaxing and becoming closer to neutral. ]

Here, sit down. I heard humans have to rest when they're hurt.