[@Raijinslayer] In any case, they'd have no doubt heard of him. Information broker, all around handy trap, assassin. And depending on the way they operate, he'd likely know a deal about them too. That is, provided they aren't the secretive type. Then again if there's a will there's a way. 

How connected is Aiden to the group besides being the leader? With the way you've described it, he seems almost loosely affiliated whilst still pulling the strings. Kinda like Nagare from K Project, but I dont think any of you have actually seen that.