You know i realized something that kind of needs to happen. In order for the protectors to begin trusting Lennox, i think something needs to go down at the hotel. If everything stayed nice and peaceful while Vital, Saphira, and Sephir are at the hotel, Lennox would have no reason to tag along. Maybe one of the bad guys walks in and starts asking question about the where abouts of Vital. Maybe NPC soldiers or hunters begin threatening Lennox to tell them where you guys are. I don't know what you guys have in mind, but somehow it has to force Lennox to help.