Why not? If you have a unique hairstyle and want to market it, you can actually label it with the Patent and Trademark Office. A hairstyle is a human creation and like most creations it can be an asset and in this case it is an intellectual property. If it gets a trademark, other people will need to get your permission to copy it. However, you must first officially submit it to the Patent and Trademark Office, pay the official fees, and complete the papers required for the filing. Of course, a brand needs a name, so you have to come up with a name that is as clear as possible so that the trademark office has no reason to reject it. But in every way, a brand is a means of preventing others from using the same idea and form for their own or commercial purposes.
However, whether you are allowed to create a trademark depends on the trademark office, but there is a very good chance that this is permissible. To approve a brand, its shape must be unique, something that can stand out from the crowd so that people can see that it is different from the norms. Like company logos, your hairstyle must be reproducible and identifiable by name. For the purposes of trading, form and name are easily identified so that others are able to tell others about it.
A hairstyle not only has to consist of hair, but can also be woven with other objects such as hair bands and bracelets. In fact, you can make it look unique with a whole range of hair accessories or something you design yourself. And remember, if it's new and nobody has it, you can put it down and make it your own. After that, you can commercialize it and license other salons to recreate that particular hairstyle. Of course, you have to make it so desirable that others copy it and want to pay you a fee.
And if you think about it, maybe those who advertised for fashion shows should have registered brands for all the girls who wore unique hairstyles as part of the fashion presentations!
But what if someone copies it without paying for the idea? Getting a trademark is one thing, enforcing it is another! The responsibility is that you have to report any kind of violations and take legal action yourself! But even if you don't get a cent for the idea and assume that the hairstyle in question will be a hit, only the people who talk about it will inevitably increase the value of your idea and your trademark. If it is a buzz, you will benefit many times over. In addition, this brand does not only have to be associated with a hairstyle, as you can also use it for other purposes, provided that you also register it under other article categories at the brand office. The possibilities are unlimited because we are not only talking about people, but also about pets and everything that a unique piece of clothing needs!