Yeah, that's probably the problem. I didn't even notice it when I first checked them in the editor, but their other stats are messed up too. Riesz has no Constitution stat (not even zero, just a blank space), Lenalee doesn't have an Agility, and they're both 0 years old. Something definitely got messed up in the guts of the file somehow. (That's on a fresh redownload of the megapack.girls file of the Round 5 Fix.)
Fortunately, as far as I can see from a quick look, they're the only ones affected.