With the formatting options here, I can not present you with a Venn Diagram for your question. However, I can answer your question with specifics about these two characters:
Both Jess and Leslie are "aliens" in their environments. Jess is an alien in his own family, where he is the only boy and where his father does not understand him because he likes artistic pursuits. Leslie is an alien in her new school because her parents are hippies and believe in living a lifestyle (no TV, etc.) that is foreign to the students.
Both Jess and Leslie share artistic talents. Jess is a prolific and talented artist. In Chapter 2, we learn that Jess:
"Jess drew the way some people drank whiskey,"
This means that he drew often. It was his way of relating to the world. May Belle is about the only person who really sees his drawings, and she is too young for her opinion to be appreciated. However, later, Leslie and Miss Edmunds both are privy to seeing his talent. Leslie's talent is her imagination. She not only is able to dream up Terabithia, but she is able to create through description the beautiful majesty of the place and the dangerous creatures they are forced to face. Leslie's imagination and Jess's artwork are the ways that these two relate to the world around them.