Harriet and Diane are best friends, and have been since grade 2. Whereas Harriet and Kimberly have only known each other since grade 8, which makes Harriet and Diane more compatible since they know more about each other. But, Kimberly and Diane are more capable of ending up closer, since Diane goes to a different high school, even though Harriet and Diane made a vow that their relationship and friendship would be ongoing til the day of their death. This is Harriet and Diane's notion about their friendship, although teachers and their parents have different notions about that promise, saying that one day they will most likely go their separate ways or get into an irreversible fight.
