Their relationship can be developed through shared danger. For example, they could be trapped in an abandoned building that is rigged with explosives by a villain. As they work together to escape, they start to trust each other more. Black Suit Spider - Man might use his enhanced strength from the symbiote to protect Black Cat from falling debris, and Black Cat could use her agility and thieving skills to find a way out. This mutual reliance can be the start of a deeper bond.
One way to develop their relationship is by having them team up for a long - term mission. Let's say there's a powerful criminal organization that they both have a vendetta against. During this mission, they have to live together in a secret hideout. They start to see each other's daily habits and quirks. Black Cat might notice how Spider - Man struggles with the symbiote's influence at times, and she tries to help him. Spider - Man could see the softer side of Black Cat when she takes care of an injured stray cat near the hideout. This kind of shared experience over an extended period can really deepen their relationship.
In fanfiction, the relationship can also grow from mutual understanding. Black Cat might have her own reasons for her actions that Spider - Man comes to understand better over time. This understanding can lead to a more complex and intimate relationship. For instance, if Black Cat is stealing for a noble cause that Spider - Man initially doesn't know about. Once he discovers it, he sees her in a new light.
One plot idea could be that Black Suit Spider - Man and Black Cat team up to take on a new super - villain in the city. This villain could have a power that is linked to some dark magic, which makes the black suit of Spider - Man react in strange ways, adding an element of mystery to the story. Another idea is that Black Cat steals something valuable that she thinks is just a regular jewel, but it turns out to be an alien artifact. Black Suit Spider - Man has to convince her to return it before it attracts unwanted alien attention to Earth.
They could be shown as co - parents who are still learning to work together. There might be some initial tension due to their different personalities, but they put their differences aside for the sake of the baby.
A unique way to develop their relationship is through a shared trauma. Let's say they both witness a horrible event that shakes them to their core. They have to rely on each other to deal with the emotional aftermath. This could lead to a more vulnerable side of their relationship. Or perhaps Black Cat gets a power - up that makes her a target, and Spider - Man has to protect her at all costs. During this time, they could grow closer as he learns more about her insecurities and she learns more about his unwavering determination. This would make their relationship more complex and interesting.
Spider - Man could develop a new sense of confidence, but also arrogance. The symbiote suit makes him stronger and more powerful, so he might start to think he can handle any situation alone. This could lead to him pushing away his friends and allies, like Mary Jane or Harry Osborn, until he realizes the error of his ways.
Often, they go through challenges together. For instance, they could be framed for a crime they didn't commit. Working together to clear their names, they learn more about each other and their bond deepens. They start to trust each other more and become closer as a result.
In some fanfiction, their interactions are full of conflict. Black Cat might have her own agenda that doesn't always align with Spider - Man's sense of justice. For example, she might be more interested in stealing from the bad guys rather than bringing them to justice in the traditional way that Spider - Man prefers.
A good Spider - Man black suit fanfiction often has a strong understanding of the character. The black suit changes Peter Parker in many ways, and if the writer can capture his internal struggle, like the balance between power and responsibility, it's great. For example, if they show how the suit's influence might make him a bit more aggressive while he tries to hold onto his core values.
With MJ, the black suit could change things too. If Peter becomes more confident in a cocky way because of the suit, MJ might not be as attracted to him. She might see him as a different person and start to pull away, which would make Peter realize he needs to get back to his old self.
The concept of Spider - Man and Black Cat being old friends in fanfiction is really appealing. It allows for a deep dive into their characters. We could see Black Cat using her skills to help Spider - Man in a tricky situation that only she could handle due to their long - standing relationship. Or perhaps a story where they reminisce about old times while on a mission together, adding a touch of nostalgia to the narrative.