Asking about "Zangetsu" won't get you much information, but Marmaroth is well known around supernatural Portland. A very old, well-spoken but belligerent warrior angel with a distrust and distaste for humans bordering on hatred. He's known for drinking too much, and a hair trigger on his "smite" button, though strangely no one has heard from him in a few days. Which is odd -- a creature of habit, he's always found at either the Cat Cafe or Crossroads. He doesn't really seem to have allegiance to anyone but himself.

... Maybe not someone you particularly want to include, anyway, unless you just need some Old Testament firepower.