Many fanfictions depict Rex as having a moment of realization. He might notice something off about the order. His relationship with certain Jedi, like Ahsoka Tano, could make him more hesitant. He could try to contact other clones to see if they are also having doubts. But as the order is reinforced, he might be forced to act against his will, which causes him great internal turmoil.
Often, it portrays him as conflicted. Rex was a loyal clone, but also had loyalty to the Jedi he served with. So in fanfic, he's usually shown as being in turmoil during Order 66.
One great example could be a fanfiction where Captain Rex struggles internally against Order 66. In this story, he might start to question the sudden order to turn against the Jedi. He could have flashbacks of his time with the Jedi he respected, like Anakin Skywalker. His loyalty to his brothers in the clone army is also tested as he tries to figure out what is really going on. Another example could be a fanfiction that focuses on Rex's survival after Order 66. How he hides from the Empire and tries to find other clones who might have also resisted the order. He could end up joining the early Rebellion, using his military skills for a new cause.
One good 'Captain Rex Order 66 fanfic' story could be about Rex's internal struggle during Order 66. He was a clone who had formed strong bonds with the Jedi, so it might show his pain and confusion as he was forced to turn against them. Maybe it delves into his attempts to resist the order in some small ways.
She would probably be very hurt and angry. Hermione is a strong - willed character, so she might immediately start trying to find out the truth and clear her name.
In this fanfiction scenario, the order's reaction would be complex. They are a group dedicated to fighting against the dark forces, and Harry is an important figure. When they find out he's been abused, they'd first ensure his safety. They could move him to a secret location, perhaps a safe house that only a few trusted members know about. Then, they'd start looking into the root cause of the abuse. Was it related to the ongoing battle against Voldemort? Were there traitors within their midst? They'd also need to consider how to handle the situation publicly, as Harry is somewhat of a public figure in the wizarding world. Their main goal would be to not only protect Harry but also make sure such abuse doesn't happen again to anyone else in their community.
She might be angry at first. She has always been loyal to the Order's cause, and this abandonment would be a huge blow to her.
Wendy might initially be very frightened. After all, being kidnapped by a fearsome pirate like Captain Hook is a terrifying situation. She could be trembling and trying to hold back her tears.
One common theme is loyalty. Rex is known for his loyalty in the original series, and fanfictions often explore his loyalty to his brothers, to the Republic, and to what he believes in.
Well, it depends on the imagination of the fanfiction writers. Some might have him retiring peacefully, while others could envision him getting involved in epic battles or uncovering hidden secrets.
First, understand the characters well. Know their personalities, backstories, and how they interact in the official Star Wars universe. This will help you make their relationship in the fanfiction believable.