Sun is a young girl who loves playing at the Creek with her pet hamster. She built a habitat for the hamster she named "Hamster Dome", which consists of a domed tower with several tunnels of varying sizes.
When she learned that Cookie had died, she goes through a few weeks of grieving and believed that a hundred hamsters could equal to the bond she and Cookie had, so she went as far as to going out after dinner and stealing several Creek Kids' hamsters.
After the Hamster Dome exploded due to the amount of hamsters in it, she and Kelsey landed in front of Cookie's grave and saw a sunflower growing out of it. She cries and said that Cookie was her best friend and that she's all alone now. She smiles when Kelsey helped her take care of the sunflower.
After taking care of the sunflower for some time, she finally comes to terms with Cookie's death, and smiles at the sunflower.