Hi there. Something feels off here if he is (a) planning to meet you and have sex with you and (b) not show you his face in a private message, let alone video call you using Skype or some other means so you can know he is real.
Personally, I suspect he is hiding his other relationship(s) from you and is using Dom/sub stuff to get into your panties because you are young and he is horny.
Either that or he is hideous and you will find that out when he sees you and he is hoping you will ignore it.
Regardless, he should be upfront with you. Being honest about who he is to you is definitely not part of the “power exchange.”