So they were going to use her as bait and watch her die to goblins and suddenly no one cares and they're free to go about their happy newbie killing days?
Just do yourself a favor and read his previous series where they're a married couple and fuck all the time
I'm sure someone remembers his other name for other websites
Completely random guess, she could be fungi.
Their cells pretty easily regenerate, and they have spores that spread around which could explain her echolocation type ability