GALE, Good Guy that he is, invited himself along by being kind of a dick about it. He and Clary will be meeting the rest at the Shipyard Ring. He is extremely useful in the woods, but he won't be so much at sea what with first time on a ship. He has not said he is unseelie ( he kinda hates everyone and refuses to align himself with them ) so that'll be fun if/when that comes out!

I also second giant crustacean for no other reason than one claw can provide enough crab meat for the entire trip.