For a start, the novel describes itself as space opera, but don't expect Legend of Galactic Heroes. And the title has "Pirates" in it, but don't presuppose Captain Marika to go full Captain Jack Sparrow :P . At one point in the novel, you'll be asking, is she's the MC or not
I'm looking forward to the anime adaptation because, well, the first volume was my first LN that I completed.
I thought it was going to be Gundam UC