One plot idea could be that the male reader is a new student at Beacon Academy. He accidentally discovers Emerald's secret past and instead of exposing her, he offers to help her face her demons. This could lead to a deep bond forming between them as they go through various challenges together at the academy.
The relationship can start with mutual curiosity. For example, if the male reader has a unique skill or power, Emerald might be intrigued. Then, through shared experiences like facing a common enemy or working towards a common goal, they can start to trust each other. Small acts of kindness, like the male reader sharing his food with Emerald when she's hungry during a mission, can also help build the relationship.
One idea could be that the male reader is a transfer student to Beacon Academy. He has a unique Semblance that catches the attention of the RWBY girls. For example, his Semblance could be related to time manipulation. Ruby might be intrigued because she loves unique abilities and wants to learn from him. Weiss could initially be a bit standoffish but as she sees his skills and determination, she warms up to him. Blake would see something in him that reminds her of her own struggles, and Yang would be attracted to his confidence.
A more complex plot could be set in a post - apocalyptic world that combines elements of both RWBY and AOT. The male RWBY reader and the AOT girls are part of a group trying to rebuild society. There could be power struggles, cultural clashes between the two groups, and of course, the ever - present threats of Grimm and Titans. This type of plot would allow for a deep exploration of the characters and their relationships in a new and challenging setting.
Perhaps a storyline where Emerald's pregnancy is a result of some sort of experiment gone wrong. This could then lead to a race against time to find a cure or solution before the pregnancy takes a more dangerous turn, all while dealing with the internal and external conflicts in the RWBY universe.
A really cool fanfiction is 'Mercury and Emerald in the Realm of Shadows'. It takes them into a dark and mysterious realm where they have to fight to survive and rely on each other more than ever. 'Emerald's Secret and Mercury's Promise' is another good one. Here, Emerald has a secret that she's afraid to share, but Mercury's loyalty to her is unwavering. And 'Mercury and Emerald: Facing the Past' where they are forced to confront their past misdeeds and try to make amends while still being the characters we know from RWBY.
One idea could be a story where the main character discovers a new, hidden type of Pokemon in the Emerald region. This Pokemon could have unique abilities that disrupt the existing power balance in battles.
One idea could be a story where the male reader and Blake are on a mission together. They face various challenges and have to rely on each other's skills. Through this, they develop a deep friendship that could potentially turn into a romantic relationship over time. This would focus on their growth as characters and the bond they form.
The plot could revolve around a new character who arrives in Remnant with a Chaos Emerald. This character is being chased by an unknown force from another dimension. The RWBY team decides to help the new character protect the emerald. As they do, they learn about the different abilities of the emerald. For example, it can open portals to other dimensions. They have to fight off the pursuers while also dealing with the temptation of using the emerald's power for their own gain.
Well, a possible plot is that the male reader is a warrior who has been injured near Ahri's territory. Ahri, with her kind heart, decides to nurse him back to health. As he recovers, they start to communicate through gestures and simple words. Their relationship deepens as they face threats from other creatures in the forest together. Also, perhaps the male reader is a scholar researching magical creatures and Ahri becomes his main subject of study. But as he gets to know her better, their relationship turns from just research to something more romantic.
One possible storyline could be the male reader being a new recruit in a group where Raven is also involved. They start off as distrustful of each other due to Raven's mysterious nature. But as they go on missions together, they gradually learn to rely on one another and form a deep friendship that could potentially turn into something more.