The Order of the Star is one of the police branches of the magical council.
Rain: The head of one of the units within the order of the star a water magic user
Slate: A light death mage disliked for his unprofessional behaviour including his sniping at Alex Verus for being a dark mage
Caldera: an earth mage and Alex Verus partner (formerly) she's a larger woman who likes using hand to hand combat
Alex Verus: (formerly Auxiliary) Mage within the order of the star