Just a Faceshield with a "Crown" added. Incase you have a small child refusing to wear a faceshield and because i have not seen something like this.

Shieldframe by https://www.thingiverse.com/thing:4251224

Tiara by https://www.thingiverse.com/thing:237034/

Maybe somebody want to make several different Tiaratypes. Im not creative enough :D