I watched the first three espisodes of The Expanse season 5, and it has me pretty curious about where Camina Drummer is going. Minor book spoilers ahead.
Drummer is a character in the books, and an important one, but the Drummer on the TV show is sort of an amalgam between book Drummer and another character named Carlos "Bull" de Baca. Book Drummer is indeed Fred Johnson's security chief on Tycho as we see on the show, and she comes back much later in an important role, but she never captains the Nauvoo through the ring (that was always Asheford), and most of what happens to her in season 3 (like breaking her spine) actually happens to de Baca.
I'm not complaining, at all, because I love the character as presented on the show, (and TBH never really missed de Baca) but it's interesting now because they've brought in de Baca in season 5 as Tycho's new security chief (see what they did there?), and seem to have merged Drummer's new trajectory into another book character named Michio Pa. Interestingly, Pa was on the Behemoth as Asheford's XO. In the books, though, she also ends up joining with Marco Inaros' Free Navy. It's an odd change to put Drummer in her place as the way they've set things up, she seems to have a serious hate on for Inaros. Is she going to have a change of heart, or will something completely new happen? I have no idea.
Unlike a lot of adaptations of books, I more or less really enjoy the changes the show has made. For the most part they're good, if not for the better, and they keep things interesting as a viewer because of things like this. It probably helps that the writers of the books have been writing the screenplays all along as well. The only potential change I'm dreading is however they end up wrapping up the story three book too soon when the show ends in season 6.