Here to write down my opinions on how Shallan's past all fits together. There's so many ways to interpret it, especially when you bring WoBs in. I like mine, and I think it has some interesting implications about the nature of deadeyes.
Shallan bonded Testament at a young age. Probably some family troubles that drove her to it? Something giving her reasons to want to hide in the gardens and dream. As we have seen, the Cryptics have been very eager to bond humans though. Recall how Shallan
I've been meaning to come here and make an addendum... When I first made this theory there were several pieces to it that I was unsure about. Pieces which had a safe, easy answer or, alternatively, a more extreme and probably unlikely answer. Most notably, I'm thinking of the assertions that Shallan used Testament throughout Words of Radiance, including in the chasm and Oathgate. (if that surprises you, don't bother questioning me here--you can read the arguments for these ideas earlier in the t