u/person2907

SINGERS ARE FABRIALS, and this is a hill I'll die on.

If you really think about it, what makes a fabrial? They have a spren, are powered by Light, and they serve some function, which changes depending on the spren. The spren is inside a gemstone in the middle.

Now lets look at a Singer. They have a gemheart at their core, there's a spren in the gemheart, and depending on the spren they serve different functions(forms).

Singers are fabrials. Fight me.

So I recently finished Isles of the Emberdark, and I just remembered that in Wind and Truth there was that one chapter where Vasher was locked up in an aluminum room in urithiru, and it was mentioned that there was a bird in the room. I don't remember the chapter very well but could that bird have been an Aviar?