Bluebell is a park ranger from the United States. As a young girl, Bluebell and her father became close to a grizzly bear they named Apollo for the starburst scar over his eye. Because of poachers, the bear hated and feared humans, with the exception of Bluebell and her father. However, when Apollo had healed, he was rejected by all the other bears in the area. Because of his status as an outcast, Apollo became violent due to the pain of this rejection, and became even more hostile towards humans. Bluebell eventually grew up and became a park ranger in the Lucky Mountains out of her love of nature.

(Source: Shaman King Wiki)