Each season of Fargo tells a completely new story with new characters, but there is just enough overlap to suggest that some characters could still make their return in the future. There have been a few instances of characters from one season crossing over into another, like how Mr. Wrench shows up alongside Nikki Swango on a prison bus in season 3, although he first appears in season 1. This suggests that showrunner Noah Hawley is not averse to bringing back old characters for minor roles, and there are plenty of intriguing criminals and cops to choose from.

https://screenrant.com/fargo-characters-return-future-seasons-wishlist/