Back in the day, I had a little saying: that I could trust Shawn with anything but my lunch, my calculator, and my girlfriend. Because he'd eat the first, spill it on the second, and hit on the third.
I can trust him to guard my back. garnetdagger can trust him to guard my back. Marah says that if he's on my side, he can guard my back, but we'd have to make sure that he was, first... and that's a complex process. Naomi doesn't want anything to do with him. Which is odd. But I'm supposing that she remembers what happened to Mona, and she's not about to let that happen again.