Love, in its various forms, is also often seen. It could be a budding romantic love, or a deep platonic love. The way the characters' feelings develop over time is a key part of these stories. Sometimes it's a slow - burn, where the relationship gradually builds, and other times it's more of an instant connection that they both have to figure out how to handle.
Another common theme is discovery. This could be the reader discovering new things about Jojo's world, or Jojo learning something new about the reader. It adds an element of excitement and growth to the story. For instance, the reader might find out about a hidden talent of Jojo's that no one else knew.