Some good characters to include are Boba Fett and Ahsoka Tano in a crossover. Boba could be on a bounty hunt that intersects with Ahsoka's mission. They could start as adversaries but then realize they need to work together. Also, Yoda is a must - include. Ahsoka could have discussions with Yoda about the deeper mysteries of the Force. And from the Star Wars: Resistance series, Kazuda Xiono could be included. Ahsoka could mentor him in the ways of the Force and combat.
In Ahsoka Tano crossover fanfiction, including Obi - Wan Kenobi would be amazing. He and Ahsoka could have some really deep conversations about Anakin. Qui - Gon Jinn could also be a good character. Ahsoka could learn from him about the Living Force in more detail. And from the new Star Wars trilogy, Finn would be a great addition. He and Ahsoka could train together in combat, with Ahsoka teaching Finn more about the Force - sensitive combat skills.
Another idea is a crossover where Rogue Ahsoka Tano stumbles upon a world full of magic. She has to use her Jedi skills in combination with the new magical elements she discovers there. For example, she might learn to combine the Force with magic spells to defeat an evil sorcerer.
One idea could be a crossover with Star Wars Rebels. Ahsoka could be betrayed by someone she thought was an ally in the fight against the Empire. Maybe a new character who was secretly working for Thrawn all along. This would lead to a complex plot where Ahsoka has to not only survive but also figure out who she can trust again.
First, you need to decide on the crossover universe. If it's with another Star Wars era, research that era thoroughly. For example, if it's the Old Republic, understand the politics, the different species, and the Force - using orders. Then, plan the betrayal carefully. It should be something that makes sense for the character of Ahsoka. For instance, it could be a betrayal of trust based on a misunderstanding or a character's hidden agenda. Next, develop Ahsoka's reaction. Will she be angry, sad, or more determined? Write her internal monologues to show her emotions. Also, think about how the two universes will interact after the betrayal. Will there be new alliances formed? Finally, don't forget to add some action and adventure to keep the readers engaged.
Storm from the X - Men would be a great addition. She has control over the weather, which could create some really interesting scenarios when combined with Wolverine's combat skills. For example, she could create a lightning storm while Wolverine battles enemies in the rain, using the flashes of lightning to his advantage.
In a crossover with Hannah Montana, obviously Miley Stewart as Hannah Montana herself. She could be in Seattle for a secret concert and needs iCarly's help to promote it without revealing her identity. It would be fun to see Sam trying to keep Hannah's secret while also being her usual wild self around her.
In a crossover with the Lord of the Rings, Aragorn could be an interesting choice. He could bring his leadership skills and combat expertise to Los Santos. The GTA 5 characters might initially be skeptical of his noble ways, but they could learn from him. He could also help them fight against a new evil force that has emerged in the city, perhaps an ancient and powerful gang with dark magic - like abilities.
If it was a crossover with The Evil Within, Sebastian Castellanos would be a great character to include. His detective skills and his ability to handle the nightmarish creatures in his own game could be useful in the Outlast 2 world. He could team up with the Outlast 2 character to solve the mysteries behind the horror. Also, Pyramid Head from Silent Hill could be a terrifying addition. His presence alone would heighten the sense of dread in the Outlast 2 crossover story.
Definitely Goku. Their previous encounters in the Dragon Ball series make it a natural choice. Their power levels and different fighting styles would create great tension and action in the story.
Well, if you're doing a crossover with '101 Dalmatians', Cruella de Vil could be an interesting addition. She might see the Aristocats as a new target for her fur coats, creating a whole new conflict for the cats to face. And the Dalmatians could be allies of the Aristocats, helping them outwit Cruella.
She could have Clone Troopers as her allies. Some of them might have defected with her and believe in her innocence. They could provide military support and loyalty.