“The beguiling corpse is a remnant of spirit attached to a perfect and incorruptible body—that’s the idea, anyway—where what I’ll term the hideous corpse is a fully intact spirit attached permanently to a rotting body.”
GtN Chapter 32, p. 272 of 374, ebook
Nona is a (presumably) fully intact spirit in a (I’m assuming it’s Gideon’s body) perfect and incorruptible body.
She’s the best of both worlds, beguiling and hideous and neither