Mitsuki Konishi (虚西 充妃 Konishi Mitsuki)  is an officer of the Reapers, having one of the higher ranks, directly serving the conductor of the Reapers' game but has ulterior motives, being willing to do whatever it takes to climb in the ranks. As an officer she's incredibly powerful, gaining control over her Noise form. She's usually referred to as "Iron Maiden" due to her cruel and cold demeanor, being haughty and a total perfectionist. Her Noise form is Tigris Cantus, a winged tiger-woman. 