Thanks to a protracted flashback in Dune: Prophecy Episode 3 “Sisterhood Above All,” we now have a sense that Tula might actually be the more deadly and dangerous Harkonnen sister. **Spoilers for Dune: Prophecy Episode 3 “Sisterhood Above All,” now streaming on Max**

The Sisterhood. The sisterhood in question refers to the manipulative nuns known as Truthsayers, but it could just as easily refer to the two most important characters in the show: Valya and Tula Harkonnen.