I am looking for a summary of the main characters in "The Upstairs Room." Not a physical description, but how they changed through the story.
You would probably get more information with specific questions about specific characters, but since you haven't you might try checking out the following enotes resources.
E-notes is the best place to search for the information you are seeking about the Johanna Reiss work "The Upstairs Room." Enotes editors have put together a study guide that is found at the following link
They also have put together a reference page which should be useful too. It is found at the following link
Hopefully these have all the information for which you are seeking, but if they don't try posting specific questions about the characters.