With his pince-nez mien and impeccable presentation, Mordecai might look excessively bookish - and he is - but he's also a proficient triggerman and the Marigold gang's latest acquisition.
Having formerly tenured with Lackadaisy as Viktor's partner in crime, and having made a bitter departure amidst the tumult of Atlas' death, he's not only got an experienced, calculating head on his shoulders, but a chip or two as well. A jack of all trades (except as it pertains to hearts).