Perhaps Ozpin becomes a villain due to being corrupted by some external force. It could be a new type of Grimm that doesn't just kill physically but also infects the mind. Over time, this infection slowly twists his thoughts and values. He starts making decisions that are harmful to the people around him, like sacrificing innocent lives for what he believes is a greater purpose, all while under the influence of this unseen corruption.
One way his transformation could be justified is through a long - held but warped sense of the greater good. Maybe Ozpin has been through so many reincarnations and faced so much loss that he decides the ends justify the means. He could start believing that only by taking extreme measures, like ruling with an iron fist, can he truly protect Remnant from Salem. For example, if he has seen countless plans fail in a more diplomatic or collaborative way, he might think that becoming a villain in the eyes of others is the only path left to save the world.
Ozpin could become a villain if he discovers some dark secret about the origin of the world or his own powers that shatters his moral compass. Let's say he finds out that his reincarnation cycle was actually a cruel experiment by some ancient force. This knowledge could drive him to madness and a desire for revenge. He might then turn against the very people he was once protecting, seeing them as pawns in a larger, more sinister game.
Yang would be angry and feel betrayed. She might be quick to take action against Ozpin, which could put her in danger. As for Qrow, he has been a long - time ally of Ozpin. His world would be turned upside down. He could either try to redeem Ozpin or be forced to fight against him. The rest of Team RWBY would also have to deal with the political fallout. With Ozpin as a villain, the power dynamics in the world of Remnant would shift. Allies might turn against each other, and new alliances would have to be formed in order to oppose Ozpin's new regime.
Ozpin is often portrayed as a wise and somewhat secretive figure in RWBY fanfiction. He's seen as a mentor - like character, but with a lot of hidden knowledge. Salem, in contrast, is usually depicted as a powerful and malevolent force. She's often shown as very alluring yet extremely dangerous.
One common opponent could be Salem. Since they are major antagonists in the RWBY universe, fanfiction often pits them against each other in epic battles.
He might be motivated by a sense of futility. After years of fighting crime and seeing no real end to it, he could think that the only way to bring about change is to control the criminal underworld himself. So, he becomes a villain to enforce his own version of order.
Well, one possibility could be that Ruby gains a whole new level of guidance. Ozpin might introduce her to secrets of the world she never knew. Maybe he trains her in unique ways, using his vast knowledge and experience, which helps Ruby become an even more powerful huntress in the long run.
In fanfiction, the 'hates' aspect could be a creative way to explore different character dynamics. It might be that the writer wants to create conflict. Naruto, coming from his own world with his own set of values, could clash with Ozpin's way of doing things. For example, Naruto values honesty and open - mindedness among friends, and if Ozpin's actions go against that, it could lead to hatred in the story.
One possibility is that the reincarnated character might use their knowledge from their previous life to change certain events in the RWBY world. For example, they could try to prevent some of the earlier tragedies that occurred. They might also have a different approach to training the Huntsmen and Huntresses, perhaps introducing new techniques or strategies based on their modern - day knowledge.
Maybe it starts with Glynda realizing her long - hidden feelings for Ozpin. She tries to suppress them at first, but then there are some events at Beacon Academy, like a ball or a special celebration. Ozpin also has some unspoken feelings for her. As they dance at the ball, they get closer and finally share a kiss, which then leads to them exploring their relationship further while also dealing with the challenges in the RWBY world.
Her view of authority might be different. Since Ozpin is a figure of authority in her life, she might be more deferential to other authority figures in the fanfiction. However, as she grows and discovers potential flaws in Ozpin's methods or secrets he's been keeping, she could start to question authority in general, leading to a complex character arc.
If Naruto loses all his friends in a tragic way, perhaps in a battle against an overwhelming enemy that the village could have prevented. His grief could turn into hatred towards the shinobi system. He may decide that the existing order is what causes all this pain and destruction, and then he starts to work against it, becoming a villain in the eyes of the village.