Cain waited until later that evening when the Blood Dancers were safely tucked into bed, sharing a large spare room upstairs, to begin the process of summoning his final Commander. Unlike Cixelcid, who was a transfer, and Svetlana, who was summoned alone because Transfers weren't cloned by the system, leaving the second half of the spell to be completed on its own, this Commander would come as a pair.
That made it even more important to Cain that he got this right the first time. Each of the Commanders would get to summon two Lieutenants of their own, and it would likely take all of them to keep the kids in line. At least until they settled down and got into a routine it would.