The Expanse: Ranking The Main Characters From Worst To Best

20. Julie Mao

Despite being credited in appearing in as many as 25 episodes, Julie Mao only makes a handful of brief appearances on the show. That doesn't make her any less important however, as her actions and subsequent disappearance set all the events of the Expanse into motion.

Daughter of the rich and powerful Jules-Pierre Mao, Julie rebelled against her father and fell in with the OPA and Anderson Dawes in an attempt to help the Belt. Unfortunately for her, she runs into the Protomolecule and ends up infecting the whole station of Eros in the process.

Detective Miller spends most of the first season looking for Julie and Holden is unknowingly doing the same. She is the crux of all early developments and when she melds with the Protomolecule on Eros, she almost destroys Earth by flying the asteroid station into it. That being said, Julie isn't given nearly enough screen time to care about her character and any emotion we do feel for her is thanks to the connection she has with Joe Miller.