Marina's a human redhead of medium height and thin build.
Intelligent, usually nice and fairly humorous even in the worst of situations, use of irony and general carelessness about everything are to be expected from her. She likes getting to know other people and getting people to know her - Eating someone or being eaten is a way of achieving this after all.
Gifted with guns and swords she possesses no magical or superhuman abilities so it's not difficult for a predator to overpower her, though she's generally not too eager to end up as someone's lunch, unless she encounters a particularily charismatic or physically attractive character who might be able to convince her to go down willingly.
For a powerful predator, she makes a fairly easy meal that's not too hard to digest but she usually won't go down without a fight - Don't underrate her, though. Enough people have gone through her digestive tract for her not to really know the number.
EDIT:
Marina Twist was permanently hunted down and eaten, along with her friends, by Sara_lina, serving as a quick, forgettable meal for the giant Lamia. They now exist as part of their predator's body fat, providing energy, and as her waste. If i'm online with this character I'm probably taking a look at older RP's. As poor Marina was eaten and digested, she won't be able to be used again in roleplays but I can still play my other characters, with whom you can request a scene with no issues ;)