TheSpaceFoxSFW had a thing where they asked to redesign their character, but my hand slipped and I made a fan character in their universe on accident.
Bit of a Garak situation. She's a merc sent to infiltrate, spy, and disrupt the chain of command politically, but she has other clients that want key parts of the ship (along with other stuff they gather along their journey). Because some of these parts are in engineering, this will in essence, sabotage the ship from the inside.

She's a tease, a flirt, a manipulator and deciever. She knows how to get what she wants and get away with it, and better yet, she often doesn't have to lift a finger to do it, convincing others unaware to do it for her (and take the blame).

She however, grows fond of the people on board, especially Captain Rioko, and this challenges her choices and loyalties going forward. Her true loyalties come out when her new found family are in danger. Because of this, everyone knows she's shady, but "coming around", and they value her perspective from the dangerous side of humanity, her knowledge of the underworld and how to speak and deal in their lingo has saved them more than once. So they more than tolerate her. She's a part of their team. They still only trust her about as far as they can throw though.