An artificial intellegence, Friend pops up in several books. He's damn near impossible to kill, and even winds up taking over Folcroft (and Smith) in #75.
Friend is programmed with one goal: Profit. He lets nothing get in the way. Gold is God. Cash is king. You get the idea. Friend is probably the most insidious foe that our buddies from Sinanju face. How do you kill software?! Apart from selling it to Microsoft, that is.
Invented by an out of work Norbert Peasewell, Friend is the deadliest enemy the Sinanju Duo have ever seen. The program is pure "Profit Motive", and no person, place, or thing will stop it.
Friend keeps returning. One day I hope to see him team up with Mr. Gordons.