[Of course she had been. Even with her demeanor and unwillingness to openly confess about it, there were the subtle signs of experience with death. In her tone, in her eyes, in her revulsion for it all.

With that revulsion would naturally come fear for seeing it again. For being at the other end of it.

... Even Diarmuid, brave and handsome Diarmuid ua Duibhne was frightened out of his mind. It was unclear whether him reaching out to Rose, laying a hand upon her shoulder was to reassure himself or her. Both, perhaps. He wouldn't mind both.]

The strongest among us would feel fear upon staring down the eyes of Death. We are still able to feel it even here. In some way, surely, that means we may survive this and emerge on the other side with our friends.