How and why is Emilia connected to Satella (the Witch of Envy) and the Witch Cult?
Not revealed yet. But it could be a time travel/timeline story.
Each time Subaru dies, it’s actually a parallel timeline. Satella is Emilia from one of them... except in the future. Where Subaru did everything &quot;right&quot; but died.
Not knowing the truth, Emilia travelled back in time, so she can &quot;save&quot; Subaru from death by making him come back from death, unknowingly creating the situation leading to his death.