Warning: Spoilers for The Marvelous Mrs. Maisel season 5, episode 1, "Go Foward."The Marvelous Mrs. Maisel actor Michael Zegen opens up about the surprise season 5 exit of co-star Stephanie Hsu. In the premiere episode of the show's final season, titled "Go Forward," one character did move on with their life. Mei (Hsu) told her boyfriend Joel (Zegen) that she was leaving for Chicago to pursue her dreams of becoming a doctor. The scene brought an end to Hsu's time on the show, which began in season 3.
https://screenrant.com/marvelous-mrs-maisel-season-5-stephanie-hsu-exit/