This was an interesting article for me to read but at the same time a bit of a trigger. My ex-wife loved cosplay and costuming and I’m sure it helped contribute to her emotions and eventual shift from an introvert to more of an extrovert.
http://www.cnn.com/2017/01/12/health/finding-your-fairy-tale-eprise-profile/index.html
A sense of escape and finding something to hold onto when overcoming difficulty can be a nice form a therapy beyond the conventional CBT or pharmacological. I doubt I’d ever go this route, costuming for me never held a strong emotional response, and I’m sure somewhere in the back of my head I’d have an aversion given my history and ex-wife. It’s something to consider however if you are looking for less traditional approaches.