In the fanfiction of Harry saving Sirius in fifth year via time travel, who could be the unexpected helper?

One possible plot twist could be that when Harry travels back in time, he accidentally alters some other events which in turn create new challenges in saving Sirius. For example, he might change the location where Sirius is being held captive, or he could unknowingly alert the Death Eaters to his plan.

Perhaps Fem Naruto travels back in time and teams up with a younger version of Kakashi. Together, they try to save Obito. Fem Naruto uses her female intuition and Kakashi uses his strategic mind. They face many challenges along the way, like dealing with the hidden motives of other ninja clans who might not want Obito to be saved as it could disrupt their own power plays.

Boruto could be an unexpected ally. Maybe he somehow gets caught up in the time - travel event with Sarada. They have a strong bond in their own time, and that would carry over. They could work together to face the challenges of the different time periods, like when they encounter powerful and dangerous ninjas from the past or future.

Poison Ivy could be her ally during time travel. Since they have a strong bond in their own time, Ivy could follow Harley through time accidentally. And Ivy's connection to nature might be useful in different time periods. For instance, in a pre - industrial Gotham, Ivy could use her powers to communicate with the natural world to find a way to get them back to their own time.

Maybe Rumplestiltskin. Even though they have a complicated history, in a different time period, they might find common ground. He could be interested in her time - traveling abilities and offer his own brand of help in exchange for something from her future knowledge.

An unexpected ally could be Darth Maul. If Ahsoka travels to a time when Maul is on the run or in a situation where their goals align briefly, they could team up. Maul has a lot of knowledge about the Sith and the dark side that could be useful to Ahsoka.

One great fanfiction could be where Sirius Black travels back in time to prevent his own imprisonment in Azkaban. He might use his knowledge of the future to avoid being framed by Peter Pettigrew. This could change the entire course of the story, as Harry would then have a more stable and present godfather figure in his life from an earlier stage.

One great fic could be 'A Time for Changes'. It beautifully weaves the relationship between Harry and Sirius while using time travel in an interesting way. The author creates a believable alternate timeline where their relationship develops in unexpected ways.

Bellatrix Lestrange is often a common villain. Since she is Sirius's cousin and a devoted Death Eater, she would try to stop Harry and Hermione from saving Sirius. She's extremely powerful and cruel, and would use any dark magic at her disposal to prevent them from achieving their goal.

Obviously, Sirius and Harry are the main ones. But including Remus Lupin can add depth. Since he was part of the Marauders and was close to Sirius, his presence can create some interesting dynamics. He can also offer his wisdom and werewolf - related knowledge to help in their time - traveling adventures.