have to be level 10 to begin the betrayal quest. As for the starter NPC for Q to FP betrayal, he is next to the fence in Qeynos Harbor. to get there, head to the dock area of the harbor, and jump in the canal just before the dock area. Swim under the water and look for a hole in the wall, swim through the hole, up and out into a small area. I'm sorry if this is vague, but I know where he is, just hard for me to tell others where he is. But I hoped I helped a little.