At the end of the Night Lords Arc, Ion is horrified at the revelation that the tea seller he addressed as “girl” was actually the Empress, Augusta Vradica.
Japanese cosplayer Mitsuya (蜜也) looks absolutely stunning as Seth! I bet that costume took a lot of work to finish! Please be sure to support the cosplayer in her Archive account! Thanks to Zoe for sending this in!
Source: 蜜也 (みつや) on Cosplayers’ Archive