After being stabbed by a third sister, the Great Interrogator heals and endures the wound with a force and contacts Vader.
He was wary of the Third Sister and contacted him directly.
Vader also contacts the third sister who discovered Obi-Wan.
Third Sister says the Great Interrogator was stabbed by Obi-Wan, but it's strange.
It is highly likely that Vader himself will go to verify the situation as soon as possible.
Third Sister and Fifth Brother return to base.
After discovering the Great Interrogator, Vader transports him to Mustafar.
It should be possible for a large interrogator to revive Anakin to Vader.
Vader instructs the Third Sister to concentrate on searching for Obi-Wan. He is a substitute for the Great Interrogator.
Meanwhile, he treats the Great Interrogator with Mustafar.
He needs to discover Obi-Wan before the Great Interrogator comes back to life. An impatient third sister.
You probably can't find Obi-Wan. Frustrated Vader. "Because you missed Obi-Wan at that time." "Use the bounty hunter."
The Great Interrogator revives and reveals to Vader the betrayal of the Third Sister.
The dismayed Vader decides to find Obi-Wan himself and confront him on behalf of the Third Sister.
Vader duels the Great Interrogator and the Third Sister. The soul that gives the winner the credit for discovering Obi-Wan. Cross-examination officer "It was a failure to make you an interrogator" (the emperor also watches the duel)
As a result, the Great Interrogator wins. At the same time, Vader discovers Obi-Wan.
In other words, it is the credit of the large interrogator.
Obi-Wan duels with Vader. A large interrogator will also help.
Obi-Wan escapes and the Great Interrogator continues to pledge allegiance to Vader.