Make sure to check out his concept art too, that should sorta help clue you in to how his powers work.
@Lunalas_Mask (Y'all know the drill by now) The song is "Take Five" by Dave Brubeck (betcha didn't think I was a jazz fan, didja?) IF I DON'T MAKE A MALE LYLET NOW THEN NOBODY WILL~ (unless Mask decides to make one or something) I'm considering this guy the anti-Blake. Much rather than gloomily moaning on about how much everyone hates him and his life sucks, I'm thinking that Jakob is a bit more of opportunist, taking advantage of any spare time he has. (Now, don't think this is Dawn levels of opportunism, she's way further down the spectrum...)