Lydia could also be involved in rescuing Stiles. She has her own powers and is very close to Stiles. She might use her banshee abilities to track him down. Also, Derek might play a role. Even though he has his own issues with the Alpha pack, he would not stand by and let them harm Stiles as he has a certain loyalty to Scott and his friends.
Scott would be the most likely one. He's Stiles' best friend and the True Alpha. He would never let the Alpha pack harm Stiles and would go to great lengths to rescue him.
Allison could be a potential rescuer as well if the fanfiction is set in a time when she was still alive. She was a skilled hunter and would not let her friends be in danger. And of course, the other members of Scott's pack like Isaac, Boyd, etc. would also be likely to join the rescue mission, as they all care about Stiles and are part of the pack.
Well, aside from Stiles, Scott is bound to be a central character. Their friendship is so strong that Scott would immediately start looking for ways to rescue Stiles. Derek Hale is another likely character. Given his past with the alpha pack and his relationship with Scott and Stiles, he would have a role to play. Then there's Allison. Her family's history with the supernatural means she has skills and knowledge that could be useful in rescuing Stiles. She could be involved in the search and rescue operation, using her archery skills and knowledge of the supernatural world to help out.
Well, perhaps Stiles gets used as a bargaining chip against his friends. The alpha pack might want something from Scott or the others, and they think Stiles is an easy target to control them.
Perhaps in this fanfiction, the Alpha pack kidnaps Stiles because they see him as a key to something bigger. Stiles is a very intelligent character, and they might want to use his brainpower for their own evil plans. He could be held in some sort of dark and spooky lair. His friends would then have to figure out where he is, and in the process, they might discover new things about the Alpha pack and their motives. There could also be some internal conflict within the Alpha pack regarding what to do with Stiles.
Obviously, Stiles is one of the main characters. Then there would be the members of the pack. It could include Scott, Derek, and other werewolves in the pack. Maybe there are also some human friends of Stiles who get involved in the story somehow, like Lydia or Allison.
Well, obviously Stiles is one of the main characters. He's the one being hurt by the pack. The members of the pack would also be main characters, though we don't know exactly which ones without more context. It could be Scott, as he's often a central figure in the pack. There might also be other characters like Derek who could be involved in either causing the hurt or helping Stiles deal with it.
Stiles is the key character here. He's the one through whose perspective we usually experience the story. In the pack, Scott is a must - he's the werewolf who has a long - standing friendship with Stiles. Derek, with his alpha - like presence, also plays a major role. Additionally, characters like Allison, who has her own arc related to the supernatural world, could be part of the main cast as well. They all interact with Stiles in different ways when he meets the pack.
There could be other members of Peter's pack such as Derek. Derek often plays an important role in stories related to packs. He might be initially skeptical of Stiles being part of the pack.
Perhaps Stiles discovers some dark secret about the alpha pack that endangers the entire town or the supernatural world he's a part of. In his sense of responsibility and his unique way of thinking, he figures that killing the alpha pack is the only solution to prevent a greater catastrophe. This can add a lot of depth to the fanfiction story, exploring Stiles' moral compass and his ability to make tough decisions.
His father could be one of the supporters. His father has always been there for Stiles, and he would understand if Stiles was standing up for what's right within the pack. Another possibility is Lydia. She's a smart and powerful character herself, and she might see the value in Stiles' actions and support him.
Stiles' father could be a major character. He would be worried sick about his son and use all his resources to try and find him. Maybe he teams up with some of Stiles' friends like Scott or Lydia.