Anakin Skywalker would also work well. His more reckless nature could contrast with Katooni's more cautious approach. They could be on a mission together and Anakin's bold actions could either inspire or worry Katooni. Additionally, Barriss Offee could be paired with Katooni. They could have deep discussions about the Jedi Code and face moral dilemmas together.
Clone Captain Rex could be an excellent choice. Katooni and Rex could form a bond as they fight side by side in battles. Rex's military experience and loyalty to the Republic could complement Katooni's Jedi skills. Also, Luminara Unduli, as Katooni's master, could be a central character in a story, showing their master - apprentice relationship and how they grow together.
Ahsoka Tano would be a great character to pair with Katooni. They are both Jedi Padawans and could have some really interesting interactions. They could learn from each other and go on adventures together. Another good option could be Obi - Wan Kenobi. He could be a mentor figure to Katooni and guide her in difficult situations.
One potential friend could be Petro. Since they are both younglings at the Jedi Temple, they might bond over their shared experiences in training and their eagerness to become great Jedi. They could support each other in lightsaber duels and in their studies of the Force.
A great plot might be Katooni having to deal with a dark side - influenced Jedi who has turned against the Order. She has to find a way to either bring this Jedi back to the light or stop them from causing too much harm. Also, perhaps a story where she discovers an ancient Jedi artifact that holds the key to a great power, and she has to protect it from both the Separatists and those within the Republic who might misuse it.
They could go on a journey to discover an ancient Jedi artifact. Katooni's Jedi skills and Pietro's unique abilities would combine to overcome various obstacles like Sith traps and dangerous alien creatures.
One possible plot could be that Katooni and Petro go on a mission to find a lost Jedi artifact. Along the way, they face various challenges like dangerous creatures and Sith traps. They have to use their Jedi skills, with Katooni's ability to sense things and Petro's combat skills, to overcome these obstacles and retrieve the artifact for the Jedi Order.
One idea could be to focus on Katooni's training at the Jedi Temple. Show her facing challenges during lightsaber training, like trying to master a difficult form while also dealing with the pressure from her peers. It could explore her relationships with other younglings and how they support or compete with each other.
Katooni is a young Jedi. Petro is also a Jedi. In fanfiction, Katooni can be developed by exploring her growth as a Jedi. For example, she could face a personal crisis where she has to choose between the Jedi Code and her own emotions. Petro can be developed by showing his journey to become a more patient and wise Jedi. Maybe he gets into trouble because of his impulsive nature and has to learn from it.
Their relationship could start as a mutual respect for each other's skills. Katooni admires Pietro's speed, and Pietro respects Katooni's Jedi training.
Commander Bly is quite underrated. In fanfiction, you could explore his relationship with Aayla Secura in more depth. Maybe show his internal struggle when Order 66 is given. Another one is Captain Rex's brother, Cody. There's a lot that could be done with his character, like showing his leadership among the clone troopers and how he dealt with the moral dilemmas during the war. And then there's Sugi, the female pirate. She has a great backstory that could be further developed in fanfiction, perhaps her adventures outside of the main Clone Wars battles.
In Clone Wars Ahsoka fanfiction, Padmé Amidala could be a great character to pair with Ahsoka. Padmé was involved in the political side of the Clone Wars, and Ahsoka was on the front lines. Their interactions could explore the different aspects of the war. Another interesting character would be Ventress. Their battles in the Clone Wars were intense, and in a fanfiction, they could form an unlikely alliance or have more complex interactions beyond just fighting each other.
Ahsoka Tano is a great character to pair with Anakin. Their master - apprentice relationship in the Clone Wars provides a lot of material for fanfictions. They have a deep bond, and Ahsoka can bring out different sides of Anakin. Another good character is Obi - Wan Kenobi. Their interactions are always full of tension and brotherly love, which can be explored further in fan stories. Padmé Amidala is also a popular choice as she is Anakin's love interest.