Vash is celebrating that he's won whatever game they're playing, but Angel is smirking, all 'whatever dude, it's just a game'.

Of course she's only like that because he won - if she won, it'd be time for celebration. Because she's a girl, and that's kind of how we roll.

Both characters are mine; this is just something I doodled and decided to finish. It was fun, though! Vash's shark tattoo is a brush used with permission.