Who is Edythe Spevey from Little Altars Everywhere and what is their importance?

Edythe Spevey is one of Sidda's fellow Girl Scouts. She is described as an unpopular girl, and even though Sidda has empathy for her situation, she refuses to act on it. Sidda is frightened that if she shows Edythe kindness, she will lose her status with the popular girls...... peer pressure.