Last night was ridiculous, even for her. Meeting with drunk Kovit, meeting with Natalia inside the washroom, and also manipulating Jonas to do what she desired him to do.
Luckily, her fake skin could conceal her real face. Kovit was a user stan and according to Samutera, stan user or most stan couldn't be fooled by simply distorted magic.
Initially, she wanted to change her face with magic. It was less hassle and convenient, but Samutera's information changed her mind immediately. The ultimate goal of the banquet was to establish Meredith's presence instead of exposing Princess Elizebeth to Kovit.
Although Meredith would disappear after the play, her presence played a crucial key to fool the nobles. Only that, she could manipulate Meredith's death successfully.