This so cute. Over time Coy has become much more comfortable around Chrysalis but I think she views Tirek as a father figure. I have a feeling her folks didn't really care about her that much and basically pawned her off on the friendship school. I also think once she learned about Tirek and his powers, she wanted to contact someone powerful who would help her make the lives of ponies miserable. Maybe the way her parents treated her caused her to turn against her own kind.