Not much is known about Caterina (Catia to friends and lovers, and maybe allies who can stand her) even by most of the other pirates, as she tends to spin wilder and wilder tales about her past to every person who asks her.

The facts, as they stand, are these: Catia is an experienced sailor who has been on the sea in one role or another since childhood. Her prosthetic left hand (the loss of the original is another litany of absolutely unbelievable stories from "I got chomped by a mermaid in a duel to the death" to "I cut myself while cooking and it got infected") has a bayonet attachment, so she likes to brag that she's never truly unarmed. She's extremely difficult to ambush or surprise in a fight, and is talented with both pistols and blades. Maybe most importantly for the mission, Catia is originally from Paramo, so she's familiar with the local culture and customs.

Unfortunately for all involved, Catia is also a fun-loving flamboyant loudmouth who has been chafing a bit under the rustic conditions on Crownbreaker Isle. So yes, the mission is of grave importance, blah blah blah, but also we're here for a good time not a long time, so she intends to party. (Also if she doesn't get to kiss a mermaid this mission is officially a failure)