I've gotten this question quite a lot, and at first I wasn't going to answer it and simply leave it as a surprise for people who wanted to figure it out on their own, but here is the list of True Beauty characters and what their names have been turned into.

If you'd like it remain as a surprise and guess for yourself when your copy of True Beauty arrives, I'd suggest that you don't read on!

• Sehun - Sean (The closest name I could think of that resembled Sehun.)
• Mihyun - Hana (My cousin's name)
• Luhan - Chris (Inspired by this cutie Luhan look-a-like)
• Baekhyun - Luca 
• Chanyeol - Aiden
• Jongin - Kai (My cousin's name, which fit perfectly considering Kai's an EXO member too.)
• Kyungsoo - Haru (I felt that Haru was a name that suited somebody who needed to be protected.)
• Yixing - Adrian (My cousin's name)
• Junmyeon - Nathan (My brother's name)
• Jongdae - Dustin (The name I want my first son to be named)
• Jaesuk - Jaymes (Because maybe it's just be but I think the name Jaymes is ing dope.)
• Jaemin - Henry
• Minseok - Chase (Because I should have at least one white name in here lol.)

And yeah I think those are all the most important characters.