The common people in the story are also important. Their reactions to the Grand Inquisitor and Christ, and their acceptance or rejection of the ideas presented, help to drive the story's exploration of themes like faith, power, and freedom.
One of the main themes is the conflict between faith and freedom. The Grand Inquisitor represents a certain view of religious authority that restricts individual freedom in the name of faith.
The Grand Inquisitor might interact with Anakin Skywalker. This would be really interesting as Anakin is on the verge of turning to the dark side during the Clone Wars. The Inquisitor could try to nudge Anakin further towards the dark side, or Anakin could sense the dark presence in the Inquisitor and be suspicious of him.
The grand inquisitor's death in the comics is usually a result of a climactic battle or confrontation with a powerful foe.
If the Grand Inquisitor travels to the Clone Wars era, things would be very different for him. First of all, the technology and the state of the galaxy are different. The Jedi are more respected and in a position of power. He would probably be seen as an oddity or a threat right away. His presence could disrupt the balance of power between the Jedi and the Sith in that era. He might try to use the Separatist movement to his advantage, maybe by influencing some of the leaders to target Jedi specifically. But the Jedi would be on high alert, and his every move would be closely watched.
One possible motive could be to gain more power. In the Clone Wars era, there are many opportunities for someone with his skills to manipulate the situation. He could try to amass power by influencing key players on both sides of the war. Another motive might be to study the Jedi at their peak. He was created to hunt them later, so understanding their ways during the Clone Wars could give him an edge in the future.
I don't know as I haven't read it, but it could be a traveler who is passing through the 5th level of Grand Central Station. Maybe there's a station worker who has a key role.
There might be some Jedi characters who are being hunted. They play an important role as the prey of the Inquisitors. Their struggle to survive and evade capture adds to the story. Also, there could be Sith lords who are in command of the Inquisitors, influencing their actions and decisions.
Dolores Umbridge is often a central character in these fanfictions. Her strict and often cruel nature as an Inquisitor in the original series makes her a ripe target for further exploration in fan - created stories. Another popular character is Severus Snape. His complex personality and his role as a double agent can be intertwined with the activities of the Inquisitor in many interesting ways.
I don't know the exact main characters in 'The Golden Key' short story without reading it. But typically, there could be a hero or heroine who is on a journey related to the golden key. There might also be a wise old mentor figure who gives clues about the key.
The main character in 'the lost key short story' could be a woman. She could be a busy mother who has lost the key to her home while running errands. As for other characters, there might be her children who are also worried about the lost key as it means they can't get into their home. There could also be a locksmith character who comes into the story later, either to help or to create more drama by being untrustworthy or having his own motives regarding the key.