Lots of girls with eating disorders also have other issues. Plus, a person with an eating disorder is not the same as Sooah. Everyone is unique. On the other hand, even a terrible person like Sooah can have an eating disorder. It doesn't mean they have to identify with Sooah.
I think the author did a great job. She made Sooah just a little bit more interesting, just a little more human. Obviously she's suffering, and it makes her insufferable. She has a lot of secrets, while acting the part of cute perfect girl. She's succeeding in fooling everyone, but she can't fool herself. I'm starting to understand her more.
I don't think it's used to make her the "bad women" but to show that Sooah does all those bad things because she also lacks confidence and feels not up to beauty standarts just like Mirae and her plastic surgery.
I don't like Sooah but bulimie is srsly really dangerous. And I don't like it that this sensible topic is used to make her the bad woman..
I mean she is sure evil but still, was this necessary to use such a problematic topic, especially when a lot of girls read this.