Star Chaser always looks up to the stars, and has very... different beliefs about them. She believes that they guide her through life, and are always with her and watching her. She also thinks that they are their own beings; just like ponies themselves.
When she finally tells this to her friends, they don't react like she would hope.
Even with the slight disagreement, she lets the bright dots in the sky guide her through life, and never loses faith in her beliefs.