Serafine and her brother are employed as the Marigold Gang alongside their equally deadly coworker, Mordecai Heller . They are neither as emotionally challenged, but are bother just as dangerous.
Serafine is a practitioner of voodoo. Her competence with it has been questioned, but... We'll see.
Serafine owns an automatic rifle, with which she appearantly has an emotional connection. She named this dead hunk of metal "Boudreaux".
Both Serafine and her brother have thick Cajun accents. It is sometimes hard for people not used to their affectations to decipher what they are trying to say(Mo'cai ).
She seems very close to her brother - they are featured in only two updates so far, where they bounced dialogue off of each other. They seem almost part of a matched set, though both have unique characteristics.