Here are some great resources from Read Write Think to help supplement your planning. They all have to deal with studying characters and how they act, feel, respond, and think. Characterization is the continuum comprehension highlighted mini-lesson focus for grades 3-5 this week, but teachers in grades 1-5 can find inspiration to adapt to their needs and student abilities now and throughout the year. :)
Author's Development of a Character
What is "Character?"
General Sample Questions for Responding on Characterization
Examples of Picture Books with Well Developed Characters
Sample Character Trait Terms
Graphic Organizer: How and Why Characters Change
Scholastic - Character Scrapbook