Camina Drummer is a character in The Expanse. She is a Belter who spent a lot of her life moving around and working in space. Throughout the series and many betrayals, she eventually worked her way up to a position as a powerful pirate captain.
Drummer leads a faction of the Outer Planets Alliance with her personal ship, the Dewalt. The entire crew of the Dewalt is part of a poly marriage; it would probably be called a polycule in contemporary parlance. She has a strong romantic relationship with Oksana but also has relationships with the rest of her crew/family.