Can I also drag in the yellow spren from Kaladin?
Because I want to point out the differences between her and this one. She seems to be similar to other spren, maybe some minor differences (leading Listeners being the most obvious of course, but also the walking on stone etc), while this spren seems very different.
Spren are pretty old (http://www.17thshard.com/forum/topic/4258-questions-for-seattle-signing-1014/?page=5#comment-68628, bottom of the post) and have, it appears, changed to be similar to one of the Shards, or maybe a mix between shards - we know for certain that some spren are of Honor (I imagine honorspren being the most obvious of those), some are of Cultivation (Wyndle and his kind?) and some are a mix of the two. We also know there are Odiumspren. It seems obvious that the spren we saw in this chapter - if we can even call it a spren - is a pure Odiumspren. However, I would argue that the yellow spren, if it is influenced by Odium (I actually also saw a nice theory about them being from Cultivation recently), then it is a mix between Odium and at least one of the two other Shards, as this spren just doesn't seem Odium-like enough.
Sorry for potentially derailing the thread in the third post.