I only have this dummy here, who is a vampire in the midst of throwing a tantrum very large, long tantrum for the past two centuries. He's very much entangled in supernatural affairs, but also does like to be around humans and delights in poking at them/winding them up. However, he has a history with James and generally won't start shit in his presence/shop (stupid witch!) so that location could be a point of connection! He's the guy who comes in and looks around but hardly ever buys anything/will at some point be demanding James feed him (he won a meal from him a while back).
He'd also take advantage of any hint of attraction towards him, as well as be very happy to waste Sam's time by asking him to explain the Supermans, the X-mens, etc.