Their relationship can be developed through shared experiences. For example, if they both get injured in a battle and have to rely on each other for survival while waiting for help. This would force them to open up and communicate more, breaking down Giyu's usual stoic exterior and allowing Shinobu to see a more vulnerable side of him.
Another way is to have them train together. Shinobu can teach Giyu some of her unique fighting techniques that involve using poisons in a more strategic way, and Giyu can share his knowledge of water - based combat with her. During these training sessions, they can start to understand each other's thinking processes and respect each other's skills more. This mutual respect can then turn into a deeper emotional connection as they see how hard the other is working.
A plot could revolve around a mystery illness that is affecting the Demon Slayer Corps. Shinobu, being the expert on poisons and medicine, tries to find a cure. Giyu gets involved when he discovers that some of his comrades are showing symptoms. Together, they suspect that a new type of demon or a hidden enemy within the corps is causing this. They have to investigate, and during this process, they face many challenges and also grow closer as they share their concerns and ideas.
You can develop their relationship by exploring their different perspectives. Ahsoka is younger and more idealistic in some ways, while Anakin has seen more of the galaxy's harsh realities. By having them debate about Jedi teachings, or how to deal with the Sith, their relationship can grow as they learn from each other. For instance, Ahsoka might suggest a more peaceful solution to a problem, and Anakin could initially be skeptical but then come around to see her point.
Their relationship can be developed through shared experiences. For instance, when they fight side by side against a common enemy. This would create a bond of trust and mutual respect between them.
Perhaps a near - death experience where Odd saves Aelita or vice versa. This would create a strong emotional connection between them. After that, they would be more protective of each other and their relationship would grow into a more intimate friendship or even something more romantic over time.
To develop their relationship, you could show them in normal, everyday situations. Like them having coffee together and just talking about their dreams and fears. This would humanize them and make their relationship more relatable. Also, having them save each other's lives in different scenarios would strengthen their bond. Maybe Spiderman saves Gwen from a falling building one time, and then Gwen saves him from a dangerous chemical spill another time. And then there could be moments of jealousy when another character shows interest in either of them, which would make them realize their true feelings for each other.
Their relationship can be developed by having them train together. Naruto can share his experiences and wisdom gained from his own training and battles. Konohamaru can then look up to Naruto even more and try to implement those teachings in his own ninja way.
Their relationship can be developed through shared experiences in the medical field. For example, they could work together on a difficult medical case that requires both of their skills. This would force them to communicate, trust each other, and learn from one another.
Their relationship can be developed through shared experiences like going on missions together. When they face difficulties side by side, they'll learn to trust and rely on each other more.
To write their relationship development, consider their different personalities. Shinobu is calm and collected, while the reader can have various personalities. If the reader is shy, Shinobu can take the lead in conversations. As they face challenges together, like fighting a powerful demon, their trust in each other will grow. You can also add some light - hearted moments, such as cooking together in the Butterfly Mansion, which will make their relationship more multifaceted.
Their relationship can be developed by having Naruto show empathy towards Nagato. Naruto could start by trying to understand Nagato's pain and the reasons behind his actions. For example, Naruto could visit the ruins of Nagato's past and try to feel what Nagato felt. Then, Nagato could be made to see Naruto's positive view of the world, gradually changing his perception.