The relationship could change in terms of trust. Noelle, being sick and vulnerable, has to trust Asta to take care of her. Asta, in turn, has to be responsible and trustworthy. This mutual trust - building experience can strengthen their bond. Also, the way they interact during this time might set a new pattern for their future interactions. For example, if Asta is gentle and patient with Noelle while she's sick, she may expect the same level of kindness from him in the future, and he will be more likely to continue to show it.
Their relationship might develop as they take care of each other while being sick. Asta, being his usual selfless self, would try his best to make Noelle comfortable. This could make Noelle see Asta in a new light and grow closer to him.
In the fanfic, since Noelle is sick, it could be a chance for their relationship to develop further. Asta, being the energetic and kind - hearted guy he is, would probably do some silly things to cheer her up. And Noelle, in her weakened state, might let her guard down more around Asta, leading to some really sweet and tender moments between them. For example, she could share some of her insecurities with him while he holds her hand reassuringly.
One possible plot could be that while on a mission, Asta and Noelle encounter a powerful and strange magic that makes them both sick. As they struggle with their illness, they have to rely on each other more than ever. Asta's unwavering determination might inspire Noelle to be stronger even in her weakened state, and their relationship could deepen as they face this difficult situation together.
Many 'Black Clover Asta and Noelle fanfiction' stories explore their relationship by showing how they support each other. For example, Asta's determination can inspire Noelle to be more confident in her magic. And Noelle's noble background and knowledge can help Asta understand the more complex aspects of the Clover Kingdom.
One common theme is the growth of their relationship. It often shows how their feelings develop over time, from being just comrades to something more romantic.
One common theme is the growth of their relationship. Since in the original story their relationship has potential for development, fanfics often explore how they get closer over time. For example, through shared adventures or moments of mutual understanding.
Growth is also a theme. Noelle crying might be a turning point for her character. It could be the moment she decides to be more open about her feelings, both to Asta and to herself. This can lead to her personal growth in the fanfic.
Perhaps in the fanfic, there is a misunderstanding. Asta might accidentally say something that makes Noelle think he doesn't care about her. This could lead to Noelle crying, and Asta then has to figure out what he said wrong and make it up to her. It could be a story about miscommunication and making amends.
You can try some popular fanfiction websites like Archive of Our Own (AO3). There are a large number of fanfics about different pairings, including Noelle x Asta. Just use the search function on the site and type in 'noelle x asta' to find relevant stories.
Romance is also a common theme. Since they are two main characters in the series, many fanfics explore the budding relationship between Asta and Noelle. This can range from a slow - burn romance where they gradually realize their feelings for each other, to more fast - paced stories where their love is more immediate. It adds an interesting dynamic to the stories.