Nott's mask

Nott's mask is a porcelain mask scavenged from a doll by Veth Brenatto and worn while she was a goblin using the name "Nott the Brave". The mask is the lower half of a pale-white face with red-painted, smiling lips. It covers her entire lower face, including her nose.

History
Veth Brenatto found the original doll somewhere in or near Felderwin and brought it home. She presented it to her small son, Luc, who seemed to like it. Later that day, goblins attacked Felderwin, and Veth brought the doll with her as she, Luc, and her husband Yeza Brenatto fled. They were captured and brought to the goblin camp; Veth later facilitated Luc and Yeza's escape, but she was re-captured. The goblins killed Veth for her actions during the escape attempt and forcibly reincarnated her from a halfling into a goblin.

After she finally escaped much later, she began wearing part of the doll's face as a mask to hide her goblin features and avoid unwanted attention and suspicion. She had the mask by the time she met Caleb Widogast in early 835 PD, five or six months before the beginning of Campaign 2. She resented her goblin form, and she hoped that Caleb would eventually be able to turn her back into a halfling.

Eventually, she gave the mask to her son, Luc Brenatto, because she did not wish to use it anymore; she hoped that it would no longer be needed when she next visited her family. She was returned to her halfling form some time after.

Behind the scenes
The origin of the mask was discussed "a little bit" by Sam Riegel and Matthew Mercer before, though its details did not seem finalized by the time of the episode. Sam was uncertain if Nott made the mask herself, and he and Matt confirmed between themselves at the table that it was scavenged from a doll.

Sam further decided that this scavenged idea was "cool and gross". Laura Bailey and Travis Willingham further unhappily compared it to Annabelle from the film of the same name.