Sorry, Nara'a - but your question is lost entirely once they take a look into the ship. After all, it's hard to think of reasonable answers to reasonable questions when you're suddenly faced with a skeleton.

And it's not like Chizuru hasn't seen bad stuff like this before. She comes from a war, after all. She has watched dying men, she has seen corpses. But it's one thing to be on the battlefield and expect that, and it's another thing entirely to just randomly come across one during your daily life.

So the moment the light falls on that skeleton, Chizuru lets out a shriek. Considering they can stand here, there's technically no longer any reason to cling to Nara'a - but Chizuru still does in the light of this, ducking behind him like she's trying to hide and clinging onto him from behind. The girl is clearly scared, to a point where she can't even get herself to say anything quite yet.