The plot could also involve a power struggle of sorts. Anakin, being a powerful Force user, might initially resist Mace Windu's training methods. This could create tension between them as Mace tries to mold Anakin into a more Jedi - like figure. Meanwhile, other Jedi might be watching this relationship closely, either in support or in suspicion, which could add a layer of political intrigue to the fanfiction.
Padmé Amidala could also be a part of it. Since she has a strong relationship with Anakin, she might notice the changes in him due to the training. She could either support or be worried about the new Anakin that is emerging under Mace Windu's tutelage. Additionally, some of the other Jedi Council members like Plo Koon or Ki - Adi - Mundi could be involved, perhaps observing Anakin's progress and having their own opinions on it.
One common theme is the power struggle. Anakin is a powerful Jedi and Grievous is a formidable foe. Their battle represents a clash of different kinds of power.
Well, obviously Anakin and Vader are the main characters. Anakin is his pre - Darth Vader self, full of potential and hope at one point, and Vader is the dark, powerful Sith Lord he becomes.
One interesting plotline could be Anakin's struggle with his past self as Vader. Maybe in the fanfic, Anakin tries to prevent Vader from making the same mistakes he did, leading to intense battles of will and lightsaber duels.
It really depends on how you write it. If it's Anakin at his peak before turning to the dark side, he has a lot of raw power and potential. But Vader has years of experience as a Sith Lord. So, it could go either way.
Anakin is likely to win. He has the power of the Force on his side. He can anticipate Clovis's moves, dodge attacks, and launch powerful counter - attacks. Clovis doesn't have any supernatural abilities like Anakin. Even if Clovis tries to use his wealth or political connections against Anakin, Anakin can use the Force to find a way around those obstacles. His training as a Jedi gives him the discipline and combat expertise that Clovis lacks.
In some fanfics, there might be a plotline where Palpatine tries to corrupt Anakin even further during the battle, using psychological warfare. Anakin, on the other hand, has to resist this while also fighting for his life. This adds a layer of psychological drama to the physical fight between them.
One interesting plotline could be a battle that takes place in an alternate universe where Anakin and Obi - Wan have different allegiances from the start. Maybe Anakin is a Sith Lord right from the beginning and Obi - Wan has to face his former apprentice in a more cut - throat battle.
One popular 'anakin vs grievous fanfic' is 'The Duel Beyond the Stars'. It really captures the intensity of their fight. The author does a great job of describing Anakin's aggressive fighting style and Grievous' mechanical prowess.