Everyone in the Motley knew Tatiana was trouble when she showed up. Everyone but Charlie. When she vanished into the hedge, everyone else said "good riddance." Then the ransom note came and Charlie went off after her. And tempting as it is to leave him to his fate, there is the bother with the Oaths and all. That and he's the only one with the key to the hollow. (This is the same as Firebird? Sweet in a different system)