Honestly, 'yo en caricatura' is a bit of a mystery. It could potentially refer to one's representation or appearance in a caricature. Maybe it's a phrase from a specific language or cultural context that we're not familiar with.
One popular theme is Komi-san's attempts at making more friends. Another could be Komi-san's experiences in different social situations outside of school. Also, fanfics might focus on the relationship between Komi-san and Tadano developing further in various scenarios.
The light - hearted and often humorous stories. For example, the way her classmates try to understand her and the comical situations that arise from miscommunications. It also has a great art style in the novel illustrations that enhance the overall appeal.