Samstag and the Hunter locked on to their respective targets. Rina and Christopher decided to break up their attack. In this situation, between the Hunter and the dwarves dressed in indigo color attacked repeatedly. The long-haired girl reflexively dodged. Meanwhile Christopher fends off the Hunter's attack. The arrows from him caused the iron surface to melt. However, they have just adjusted their cooperation. It looks like Samstag and the Hunter don't want to lose to each other. It was a stark contrast to Rina and Christopher who were used to practicing together on the fourth floor. And both know each other's weaknesses.
*Russian Roulette = a deadly game using a revolver. The game begins by removing one or more bullets from the gun cylinder. Only luck can save the player from death, which is when the trigger doesn't trigger the bullet projectile.