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.
Perhaps the story focuses on the relationship between Ruby and Ozpin as a father - daughter type of bond. Ozpin could share his past with Ruby, and in turn, Ruby could bring a new perspective to Ozpin. This could lead to them working together to face the threats in the RWBY world in ways that no one else could have thought of. Ozpin's wisdom combined with Ruby's enthusiasm and unique abilities would make for an interesting dynamic.
In addition to the obvious ones, Glynda could play a role. As an associate of Ozpin, she may have some interactions with Ruby. Also, the villains in the RWBY universe might target Ruby more because of her new connection to Ozpin. So characters like Cinder or Salem could potentially interact with Ruby in the context of this fanfiction, either directly or through their minions. This would add a whole new layer of danger and intrigue to Ruby's story.
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.
Another aspect could be the relationship between Ruby and the other characters. Since she's being raised by Ozpin, her interactions with Team RWBY might change. She could be more reserved or have different priorities. Maybe she'd be more involved in Ozpin's plans from the start, causing a rift between her and Weiss, Blake, or Yang who might not understand her sudden change in attitude.
It could be that Ruby has to deal with the consequences of a major decision she made in the past. This causes her to question her leadership skills and she embarks on a journey of self - discovery to become a better leader for her team.
The plot could involve Ruby finding a balloon that has strange powers. For instance, it might allow her to fly, which is something she doesn't normally do without her scythe's recoil. This new ability could change the way she approaches battles and exploration in the RWBY world.
One common theme is self - discovery. Ruby often has to figure out who she is in the context of her new family or situation. For example, in many of these fanfictions, she might realize new strengths or weaknesses she didn't know she had.
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.
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.
One possible plot could be that Ruby discovers Yamato in a strange new world or dimension within the RWBY universe. She has to figure out how to use it or control it while also facing the challenges that come with it, like other Grimm or villains being attracted to the power of Yamato.