Maybe 'Akko x Sucy: Little Witch Academia Fanfic'. It's straightforward and clearly indicates that it's a fanfiction about the relationship between Akko and Sucy in the context of Little Witch Academia.
A Sucy love fanfic could focus on a forbidden love aspect. Given Sucy's somewhat odd and independent nature, she might fall for someone who is from a different group in the Little Witch Academia world. This could lead to all sorts of interesting plot twists as they try to navigate their feelings while dealing with the potential consequences of their relationship in the magical school environment.
One interesting 'Little Witch Academia Sucy' fanfiction could be about Sucy's adventures in a magical forest that wasn't explored in the original series. It might involve her finding rare magical plants and using her unique skills to overcome the challenges there.
One plot could be that Akko and Sucy team up to enter a secret magical competition within the school. They have to overcome their differences and combine their unique magical skills to succeed.
Another place to check is FanFiction.net. It has been around for a long time and has a lot of fanfictions related to various shows, including 'Little Witch Academia'. You might find some great Sucy - centered fanfictions there. Just be aware that the quality can vary, so you may need to read a few to find the really good ones.
One plotline could be that Sucy has a secret admirer who leaves her little gifts related to mushrooms. As she tries to figure out who it is, she starts to open up her heart to the idea of love. Along the way, she might face some self - discovery as she realizes that she is capable of loving and being loved in return. This could also lead to some comical moments as she misinterprets some of the signs from her admirer.
One great aspect of 'little witch academia crossover fanfiction' is the potential for unique character interactions. For example, when characters from 'little witch academia' are crossed over with characters from another magical - themed series, it can create really interesting storylines. Maybe a character from 'little witch academia' could learn a new spell from a character in the other series, which would add an exciting new element to the story.
One really good 'little witch academia crossover fanfiction' is the one where it crosses over with 'Harry Potter'. It combines the magical school elements in a really interesting way. You can find it on many fanfiction websites.
I would recommend 'The Unlikely Bond' which beautifully portrays the growth of Akko and Diana's relationship. It starts with them as rivals in school and gradually shows how they come to understand and care for each other.
One great 'Little Witch Academia' fanfiction is 'A New Adventure at Luna Nova'. It continues the story of Akko and her friends with new magical challenges. The characters are well - written and it stays true to the spirit of the original series.