I know some people will disagree with me on this opinion, but I am gonna say it right now. I love this character! She is such a psychotic and evil filly and its very entertaining to watch! Sunni Westbrook did an wonderful and fantastic job with her voice and I love her design too. She can switch between cute and kind-hearted…. to mean and nasty! And its awesome! She is now tied with Queen Chrysalis as my third favorite villain in the entire show. I really hope we get to see more of her in Season 9. Maybe we get to learn more about this filly and why she did her actions in Season 8. Her true motive is to use friendship against our heroes. She will even get rid of all the magic in Equestria to get what she wants. That is devious and smart, even for this filly. However, I always wondered why she is so deliciously evil. Her early life is unknown so maybe we will find out in Season 9. ^^
All we know is that Big Jim Miller said that Cozy Glow’s parents are unknown and that she could be an orphan child. It is unknown what happened to her parents. They probably disappeared, disowned her, or they died. All three are possibilities but the third one might be too dark for this show. Lol. But they pulled off death before in the show. King Sombra, The Storm King, and Applejack’s Parents are good examples of this. Lol. However, both Storm King and King Sombra can potentially return and be resurrected. Applejack’s parents on the other hoof are completly gone and it was hinted that they died instead of straight up telling or showing it. They can do the same with Cozy and her parents, as long as they make it work.
A while back, I wrote a journal where I theorized that Cozy may have been born with systemic hypoplasia, a rare condition which kept her from ever aging, meaning that she spent all of her life looking like a filly! She is actually an adult and that will explain why she is so smart and cunning. The MLP Staff did confirm that Cozy Glow is inspired by Baby Doll from Batman: The Animated Series so it is a huge possibility. I might be wrong about this but it will be very interesting and it could explain her behavior as well.
Anyway, I made a stamp for this awesome character and for all the other Cozy Glow fans out there. ^^