Royal Hair Coupons

I was going to buy a Royal Hair Coupon and use it at Henesys to get the new female hairstyle that was recently released.

However I have a question regarding these coupons. Do I get to choose my hairstyle, or is it random? Assuming it's random, does the randomness involve only Royal styles or will it have a chance at being a crap-average regular hairstyle?

Overall, will it be expected of someone to use a large amount of these coupons to get their desired hairstyle?

Thanks in advance.