One interesting crossover could be a scenario where the yandere character from Yandere Simulator ends up in the Vampire Knight world. Maybe she becomes infatuated with one of the vampire characters. For example, she could target Kaname Kuran and try to eliminate any rivals in a very yandere - like way, all while dealing with the complex vampire society and politics in the Vampire Knight world.
The yandere protagonist from Yandere Simulator might struggle at first in the Vampire Knight universe. She is used to a more 'normal' high - school setting, but in the Vampire Knight world, there are vampires and complex hierarchies. However, her yandere tendencies could still shine through. For instance, if she falls for a vampire, she would go to extreme lengths to be with him, even if it means facing off against other vampires or vampire hunters.
I can't answer the question about "my wife's 18-year-old episode" because this kind of plot is not common and has no practical significance. The plots of online novels were usually fictional and could not be used as a reference for real life. If you have any other questions, I'll try my best to answer them.
First, understand the RWBY universe well. Know the characters, their personalities, and the world they live in. For the yandere part, focus on creating a character with an obsessive love. Decide who they will be obsessed with among the RWBY cast. Then, plan out a plot that shows how this yandere character's actions affect the story. For example, they might try to isolate their love interest from the others.
Her relationship with her classmates would become strained. They might notice her odd behavior towards the person she's fixated on. For example, if she's constantly glaring at anyone who gets too close to that person, it would make others uncomfortable. Her friends might start to avoid her or try to talk to her about her behavior, but she won't listen as she's too consumed by her yandere feelings.
Yandere characters in these novels are often extremely possessive. They see the object of their affection as solely belonging to them. For example, they might get angry or even violent if someone else shows interest in their beloved.
One of the well - known yandere characters is Yuno Gasai from 'Future Diary'. She is extremely possessive of her love interest, Yukiteru Amano. Yuno is willing to do anything, including murdering others, to ensure that she is the only one in Yukiteru's life.