One way is to put them in a situation where they have to rely on non - verbal communication. Maybe they are in a place where sound is not possible. They would have to learn to read each other's expressions and body language more deeply. This would force them to understand each other on a different level and strengthen their relationship. Also, they could be given a shared power that they can only use when they are in complete harmony. This would require them to work on their relationship constantly to be able to access this power.
A unique way to develop their relationship is to give them a common enemy that is not a physical being but rather an idea or a concept. For instance, they could fight against the idea of prejudice in their world. As they work together to change people's minds and promote equality, they would grow closer. They could also have a situation where they have to take care of a magical creature together. The responsibility of caring for another being would make them more empathetic towards each other and enhance their relationship. Moreover, they could be part of a prophecy where their relationship is the key to saving the world. This would add a layer of importance and depth to their connection.
Their relationship could develop uniquely if Charlie starts teaching Renesmee about human history and culture. Since she has a vampire side, she might view things from a different perspective, and this exchange of ideas could deepen their bond.
Their relationship could be developed in a unique way if Joker starts to see Poison Ivy as more than just an ally in crime. For example, he could start to be genuinely interested in her plants and how they work. This newfound interest could make Poison Ivy see him in a different light, and they could start to bond over creating new plant - based weapons together.
Their relationship could be developed uniquely by having Lila actually start to feel guilty about her lies when she sees how kind Adrien is. She might slowly try to change her ways, and Adrien, being the good - hearted person he is, could help her become a better person. This would be a very different take on their relationship compared to the usual animosity.
I'm sorry, but I don't have specific 'basara and mio lemon fanfic' to recommend directly. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net.
One common theme could be the exploration of their relationship in different scenarios. Maybe it's about how they overcome challenges together.
One plot idea could be that Basara and Mio are on a journey to a mysterious land where they face various challenges together. Along the way, they discover new powers within themselves and their relationship deepens. Another could be a time - travel plot where they go back in time to change a crucial event that affects their world, and in the process, they learn more about each other's pasts. And a third idea might be that they are trapped in a magical realm where they have to solve puzzles and riddles to escape, and this adventure brings them closer as they rely on each other's strengths.
Their relationship could develop uniquely if Rachel takes on a teaching role for the younger glee club members under Will's guidance. This role reversal would force them to see each other in new lights and create a deeper bond.
A unique way to develop their relationship could be through a series of challenges. For example, they are trapped in a mysterious dimension together and have to rely on each other to escape. In the process, they discover each other's strengths and weaknesses, and Kurama realizes that Kushina is not just Naruto's mother but a powerful ninja in her own right. This mutual respect and reliance would strengthen their relationship.
Their relationship could be developed uniquely by having them start as enemies in a sense. For example, Sephiroth could be on a mission that Aerith unknowingly gets in the way of. But instead of killing her immediately, he's intrigued by her. This initial encounter could spark a series of events where they keep crossing paths. Each time, they learn a bit more about each other. Maybe Aerith starts to see the pain behind Sephiroth's cold exterior, and Sephiroth begins to respect Aerith's strength and determination. Over time, this could lead to a complex relationship that is part friendship, part something more, as they both struggle with their own destinies and how the other fits into it.
Another way to develop their relationship uniquely is if Aipom gets a prophecy about a great danger that Ash will face in the future. Aipom decides to secretly train itself extra hard to be able to protect Ash. When Ash finally discovers what Aipom has been doing, he is touched and their relationship becomes even stronger. This would show a different side of their relationship, with Aipom being the protector instead of the one usually being protected by Ash.