I like so much your post because you offer us some clues to create our own characters.
In my opinion, we should take into account all of these aspects if we want to create a new character.
But…what about the students? Do you think all these aspects are enough for them?
I think that If we would want the students to create their own character, we should provide them with some language scaffolding. We could give them some adjectives related to appearance and personality, some grammar structures to describe people, animals,etc.
Maybe, another option could be giving them one example of our own character. That way, our students can have a template of the task they have to do.
Once children have their own characters, we should do something with them. What do you think Lidia? Which kind of activities can we carry out?
I purpose some:
– We can collect all of them and carrying the imagination museum (the same that we did with the reading map) and our students can vote for the most amazing one. Furthermore, they can talk in English, of course, with their peers and make them questions about their drawings and creations.
– Another one, could be a little performance: we can organize our students in groups. Then they have to share their characters with their partners and create a little story in which all of them will be involved. That way, we will promote the communication between them, develop their creativity and also we will work on HOTS (High Order Thinking Skills).

In conclusion, working with characters offers a wide range of activities that we can carry out in our classrooms. Furthermore, it gives us the opportunity to work on multiple intelligences and the development of creativity.