Saul is just awful. For Pru and Simon, you can at least see how they weren't bad in the beginning. But Saul is just rotten to the core. The way he manipulates Katherine straight away... It's sad how easily she falls for it all, but she's young and trusting of her mentor, which you can't fault her for at all. But knowing she's going to fall in love with a man who thought about snapping her neck more than once on their first jump. It's so sad.
And to top it all off he so casually lists off his to-do list at the end, one item being the God's Hollow incident.