Putting this out there into the world: given that the Loki TV show seems to be loosely inspired by the Loki: Agent of Asgard comic series here goes my theory for the show:
1. Sophie Di Martino: Lorelei-style role, where she is antagonistic but works together with Loki to bring down a bigger bad, which in the comic was King Loki manipulating the almothers of Asgard, but in the show is likely the TVA given the theme of evil within the establishment
2. Meanwhile something evil is brewing within the TVA, just as how King Loki was manipulating events to hasten the destruction of Earth and best Thor: TVA is likely to be self-serving and the timekeepers and even some of the other authority figures are definitely corrupted