One possible plotline could be that Rouge discovers Shadow in a state of deep depression. She tries to cheer him up by taking him on adventures, showing him the beauty in the world that he's been missing. Another could be that Shadow's depression is a result of his past traumas, and Rouge, with her understanding nature, helps him face those demons. Maybe they start off as just friends, but as Rouge continues to be there for Shadow, their relationship deepens into something more romantic.
Perhaps Shadow's depression is causing him to isolate himself. Rouge, being the curious and caring character she is, doesn't let him be alone. She starts bringing him small gifts, like shiny gems she finds. These little gestures slowly break down Shadow's walls. They then embark on a journey together, with Rouge constantly supporting Shadow, and their relationship evolves as they face various challenges along the way.
Their relationship can develop as Rouge shows empathy towards Shadow's depression. She might start by just being a listening ear. As time passes, Shadow begins to trust her more and opens up. This trust can then turn into a deeper connection, and they may start to rely on each other more.
A plotline could also involve Zane being in a downward spiral of depression, pushing away everyone around him including Laurence at first. But Laurence doesn't give up. He continuously tries different ways to reach Zane, like bringing him to places Zane used to love or introducing him to new hobbies. Eventually, Zane starts to open up and their relationship deepens as Zane begins to heal.
One plot idea could be that on Halloween, Rouge discovers an ancient artifact in a spooky, abandoned castle. She enlists Shadow and Knuckles to help her figure out what it is. As they explore the castle, they encounter various traps and spooky creatures. Along the way, they start to have some friendly competitions and arguments, but also grow closer as a team.
One possible plotline could be that the maid is sent to Naruto by someone who notices his depression. The maid then tries to bring some order to Naruto's chaotic life, cooking for him, cleaning his place, and gradually, through her kindness and care, Naruto starts to open up and become less depressed.
A really cool storyline is when they are sent on a mission to a parallel dimension. In this dimension, their personalities are slightly different, and they have to adapt while still trying to achieve their mission goals. It's interesting to see how they interact with the alternate versions of themselves and other characters. This type of fanfiction often explores the concept of identity and how their relationship might change in different circumstances. And it can be full of action, mystery, and character development.
One common theme is the exploration of their relationship. It could be a romantic relationship or a deep friendship. Another theme is adventure, as they often go on missions together in the fanfictions. For example, in many stories, they are on a hunt for a powerful Chaos Emerald or trying to stop an evil villain.
Shadow would likely become more protective. He's usually a solitary and tough character, but with a baby on the way, he'd soften up. Rouge, on the other hand, might become more nurturing. Her sly and flirtatious side could be toned down as she focuses on motherhood.
One possible plotline could be that his friends or allies have to take care of him in his baby form. They might struggle with things like feeding him, changing his diapers, and keeping him out of trouble.
For Rouge, emphasize her cunning nature. In a Halloween setting, she could be using her skills to find hidden treasures or secrets. Describe her sly smiles and quick thinking. For Shadow, show his brooding side but also his loyalty. Maybe he's reluctant to get involved in Halloween hijinks at first but does it for his friends. For Knuckles, play up his strength and protectiveness. He might be on high alert during Halloween, thinking there are threats to his island.
The fanfic could be centered around a powerful Halloween artifact that is said to grant great power. Rouge wants it for her collection and power - up, Knuckles wants to protect it as it might be dangerous in the wrong hands, and Shadow wants to study it. This leads to a complex situation where they initially fight over it. However, as they start to understand the true nature of the artifact and the real threat behind it (maybe an ancient evil that awakens on Halloween), they join forces to deal with it and prevent disaster.