How I develop my character for illustration

How do I create characters for my illustrations?

First, I get inspired in creating a character for my illustrations through either personal acquaintance or relationship.
In this case, a little girl named Rose came over with her parents to spend the day with us last Friday. Rose is an adorable girl adopted from China by Jan and Jon.

Below are some sketches I made from a scene in the playground with Rose:

Next, I traced the whole sketch to a watercolor paper on a light box and started painting in watercolor.

Below is the work in progress entitled " A Day in the Playground with Rose".

TO BE CONTINUED.... watch out for the finished painting!!