The rights to publish the books belong to Rowling, and all other trademarks belong to Warner Bros.

Of course, Rowling has the absolute highest command on major IP matters, and her status is extremely high, such as the selection of movie characters and the plot of the movie, everyone knows this)

What? mean? In layman's terms,

If someone writes a fanfic for profit, it is Rowling who sues him, not Warner

If someone plagiarizes the Harry Potter series, write a Harry Potter The special and magical Chinese Muggles, it is better for Rowling to sue him instead of Warner

If you one day have money to set up a publishing house and want to publish the Harry Potter series and make a profit, then You need to ask Ms. Rowling for permission and give her a cut.

This is called copyright (text, original work), and the copyright of books is basically limited to this.

Similarly to movies, Warner owns the distribution rights of movies.

So who does the trademark belong to? The answer is Warner. All Harry Potter trademarks and everything related to trademarks, as long as they are registered, belong to Warner.

A few examples:

Universal Studios does not own this trademark, so why can Universal Studios have Diagon Alley? Because it is a partner with Warner and not directly with Rowling

Lego has several Harry Potter games. Where does the copyright come from? Warner, not Rowling

If you were a toy manufacturer and you came up with an Australian Opalosaurus doll, who would you ask for the license? Warner, not Rowling

You are a domestic game manufacturer and want to link up with the Harry Potter series and produce character cards. Who should you contact? Or Warner

The so-called IP, that is, intellectual property, when we talk about this IP, strictly speaking, it includes books, movies and others

But when you talk about this When it comes to games, or other HP games, of course it does not mean publishing books, but using the world view, virtual characters, and other things that belong to the IP. Who should I turn to? The answer is obvious

Finally, the promotional video for this game clearly mentions Portkey Games, whose parent company is Warner.