Family and relationships also play a big role. It could be about the relationship between Michonne and her daughter, or how the daughter forms new bonds in the harsh world. For example, her friendship with other survivors or romantic relationships as she grows up. The fanfics often explore how these relationships develop and change over time. It might also deal with themes of loss and grief, as characters are likely to lose people they care about in this dangerous world.
Well, you can try searching on fanfic platforms like Archive of Our Own. There are often a lot of great works in that category. Just type in the relevant keywords and browse through the results.
There could be characters like Rick. He often has interactions with Michonne in the broader 'The Walking Dead' universe, and might also be present in the graphic novel to some extent. Another one could be Andrea, as she is also related to Michonne's story.
Yes, Michonne is present in the comics. Her character development and role are quite prominent. She faces various challenges and her actions have a big impact on the comic's plot.