Mizuki pauses, eyebrows subsequently furrowing downwards to show her utter and obvious confusion. She had partially expected this reaction from 'Zee' after noticing the mischievous lilt in not only her tone, but her eyes too.
Mizuki folds her arms, and frankly, she can't think of any way that this could work out. It is a childish conception—to believe a human of her weight could go into the ocean without sinking immediately.
"It's not possible," she says, not mentioning whether or not she's for or against the idea.
'Zee' takes this as a sign of approval, or no real concern on her side, to which she holds out a palm invitingly.
"Are you trying to lead me to my death?" Mizuki scolds, retracting her hand warily.