Went and made this to show the function of Gwen's mask. (and accidentally made it look like a "creepy" smile)
Unlike Winston and Syrus, which is just cosmetic, the one she wears has a reason.

When she was younger, an unknown incident caused parts of her upper beak to break. So the person she lives with ended up making her a prosthetic beak.
(much like how some have been known to help actual birds in a similar fashion)

This mask also allows her to use it along with the remaining parts of her own. (will show it in another pic later)
When open, you can even see the lower part as the upper half is mostly hidden. The prosthetic beak is fitted with a stretchy cloth band that wraps around her head.

While I do have an alt version of her without the mask, showing the damaged beak, it'll be posted at ArtFight and Toyhouse at a later time.
I also plan on doing an upgraded version of it as well. Perhaps a better design, and one that looks less creepy.