There are fanfictions that explore Peter Pettigrew's early days at Hogwarts. Maybe he was once a more innocent boy who got influenced by the wrong crowd. For example, a story could show how he first met James, Sirius and Remus and how his insecurities led him down the path of eventually becoming a Death Eater.
One unique plotline is when Peter Pettigrew is given the chance to go back in time and change his actions. Another is where he has a secret alliance with a group of wizards who are trying to overthrow Voldemort for different reasons than the Order of the Phoenix. Also, some fanfics have him being a double agent all along, not really loyal to Voldemort but having his own agenda.
One common theme is redemption. Many fanfictions explore the idea of Peter Pettigrew seeking redemption for his actions. Since he was a traitor to the Potters, some stories show him trying to make up for it, often in relation to Harry.
Sure. 'Peter Pettigrew: The Untold Story' is an interesting fanfic. It shows Pettigrew in a different light, not just as a simple villain. It details his relationship with the other characters in a more complex way. Then there's 'The Mystery of Peter Pettigrew' which focuses on uncovering secrets about him that were not known in the original books. And 'Peter Pettigrew and the Path to Forgiveness' is about his journey towards redemption, which is quite a unique take on his character.
There's a fanfic where Peter Pettigrew is actually a double agent. He fakes his loyalty to Voldemort to gain information for the Order of the Phoenix. The plot twist comes when everyone discovers his true intentions and has to re - evaluate their view of him.
A rather unique fanfiction is 'Harry Potter and Peter Pettigrew: An Unlikely Bond'. This one delves deep into how Harry, after learning about Peter's past and his fear - driven actions, decides to give him a chance. It shows how their relationship develops over time, with Peter slowly trying to make amends for his past deeds and Harry trying to understand the man behind the traitor.
Maybe in the fanfiction, Harry catches Peter Pettigrew while he's trying to escape to Voldemort again. Harry uses some new spell he's learned to trap Peter. Then, instead of handing him over to the authorities right away, Harry tries to get information out of him about Voldemort's plans. This could lead to a whole new adventure for Harry and his friends as they try to use the information to prevent Voldemort's next move.
There might be new witches and wizards who have heard of his story. They could be either fascinated or disgusted by his past deeds. He may also run into future versions of Hogwarts professors. They would probably be very different from the ones he knew, with new teaching methods and different personalities.
It would strengthen their bond. His friends would be in awe of Harry for catching such a dangerous and elusive figure. They would see Harry as even more of a hero, and it would bring them closer together as they deal with the aftermath. For example, Hermione would be eager to research all about Peter and what his capture means, and Ron would be proud to have Harry as his best friend even more.