Potential allies for Merlina could include other young wizards who are also outcasts or have a similar goal. For example, those who are interested in exploring forgotten magic. Additionally, magical creatures might side with her. If she shows respect for them, they could help her in times of need. There could also be a secret society within the wizarding world that sees Merlina's potential and decides to support her.
One common theme is adventure. Sonic is known for his adventurous spirit, and when combined with Merlina's magical world, there are always new places to explore and challenges to overcome. Another theme is friendship or a deeper relationship. Since they are from different worlds, their connection is often explored, whether it's a simple friendship or something more.
One great 'Wednesday x Enid fanfiction' is 'The Unlikely Bond'. It beautifully explores their growing friendship in Nevermore Academy. It has really interesting character interactions that stay true to their personalities from the show.
I also like 'Sonic's Encounter with Merlina's Magic'. It begins with Sonic accidentally stumbling into a powerful magic spell cast by Merlina. From there, it's a journey of discovery for Sonic as he tries to figure out how to reverse the spell's effects while also getting to know Merlina better.
First, think about the relationship between Sonic and Merlina. Decide if it's going to be a friendship - based story or something more romantic. Then, come up with a basic plot like Sonic and Merlina teaming up to stop a common threat.
One idea could be Sonic and Merlina going on an adventure through different dimensions. Another could be a story where Merlina tries to use her magic to help Sonic defeat a new powerful enemy. And a third could be a more comical plot where Sonic has to teach Merlina about the modern world.
One great 'Wednesday Addams x Enid Fanfiction' is 'A Strange Bond'. It beautifully explores their contrasting personalities. Enid's bubbly nature and Wednesday's dark allure are well - depicted as they navigate their friendship at Nevermore. It has some really touching moments that make you root for their relationship to grow.
Another theme is the idea of finding family in each other. Since they are both at Nevermore Academy, away from their own families to some extent, some fanfictions focus on how they become like a family to each other. For example, in a story I read, they celebrate holidays together in their own special way at the academy, creating new traditions. This theme of building a new family unit between them is really heartwarming.
One common theme is the development of their friendship. Since they are roommates with very different personalities in the show, fanfics often explore how they get to understand and care for each other more deeply.