I think there are several, but the exact number might change as new ones could be released. You might want to check reliable manga databases or official sources for the most accurate count.
Another theme is time - related. Since Homura has the ability to manipulate time in the show, many fanfictions play with this concept in relation to her relationship with Madoka. For example, stories might involve Homura going back in time to save Madoka in different ways or dealing with the consequences of her time - traveling on their relationship.
Definitely. The art style is beautiful as always, and the plot twists keep you on the edge of your seat. It delves deeper into the magical girl concept and the consequences that come with it, which is fascinating.
One common theme is the exploration of different power systems. For example, when crossing over with other magical girl shows, how the magic in Madoka Magica compares and interacts with the other's magic system. Another theme is the clash of different worldviews. Characters from Madoka Magica, who often face a rather bleak reality, meet characters from more optimistic universes, and this creates a lot of interesting conflict and growth opportunities.
One great Madoka Magica OC yuri fanfiction is 'A New Bond'. It features an original character who forms a very deep and loving relationship with one of the main characters in a yuri context. The story is well - written, with great character development and a captivating plot that keeps you hooked from start to finish.
For 'Madoka Magica', one key element is the false promise of being a magical girl. For Charlotte, her key element in the back story is her transformation from a hopeful magical girl to a witch. This shows the dark side of the magical girl concept.
Finally, plot is important. Have a clear story arc that involves the yuri relationship as a central part. It could be a story about the OC and her love interest trying to overcome a threat in the magical world together. This not only adds excitement but also gives the relationship a context to grow. Also, don't be afraid to add your own unique twists. Maybe your OC has a special power that affects the relationship in an unexpected way. Just make sure it all fits within the framework of Madoka Magica.