I have a theory that witches tend to create a "gamechanger" that echoes their aspect and that ends up leading the session to victory or gives a advantage. (Damara screwed with time to "doom" her session and require a scratch in all timelines ,leading to the beta trolls) Feferi made the dream bubbles and Jade's actions in the Cascade flash) So what do you think a Witch of Hope would do for their session?

Well, a Game ‘Changer’ is pretty much what Witches are, they Manipulate their Aspect after all. A Witch of Hope, though… Maybe they’d bring a Session back from the brink of being Doomed? Restoring lost Hope and fixing pretty much everything that’d gone wrong? It could be a huge amount of things really.