@lancedark Ivan Serville, one of Charlotte's disciples and suspected to actually be the Demon King that Charlotte defeated once upon a time. It was kinda heavily implied that real Ivan is dead and the Demon King stole his body. He's one of the potential ML's.
Wait, i just realized it now but this Vice captain of black moon has same fitures with Carsillion? Red hair and purple eyes (which also the same eyes color of those princes and princess of Marvell). So perhaps he's Carsillion's blood relative?