Adrenaline was beginning to flow through the veins of the Kaguya, sparking an energy that was both ferocious and unending. It was supressed when Rosuto was calm... but when he began to become energized by the chemical reactions in his body, it became warfare. His Kaguya heritage pouring out of his chakra like a bloody red hue. And since he was waiting for her attack, Rosuto manipulated the bones in his ulna-distal, thorax and tibia. As the fires of a thousand years of genes were lit with the promise of a fight, he began to form handseals as well.
From his forearm, a special bracer of bone covered it, allowing it stability and enough manueverability while he fought, and also, a special boney curiass (breast plate) that acted the same way as the bracer and shin-guards on his legs.
"I'll let you handle her and step in if you require assistance, Rosuto." Jin said calmly, taking a step back so Sanbi could focus her gaze on the one that was growing a similar shell to her own.
"Oh, yes--yes--of course, Jin-sama. Just go ahead and relax! Keh keh keh..." Chuckled an amused Rosuto. His tone had changed and so had his eagerness, making him look slightly crazed. But he was resting on his last seal, waiting for the right moment.
Then it came. Sanbi opened her jowels wide, letting loose a torrential blast, which forced Rosuto to do the same. He had used "Suiton: Baku Suishouha" which expelled water from Rosuto, creating a large, immoveable bubble that absorbed the blast from Sanbi, and grew as well--quickly too. Rosuto now stepped on it, and shot up the side and over the top of the dome, heading towards Sanbi at a dazzling speed. Rosuto jumped, sailing to the air towards a confused Sanbi. Rosuto landed on her nose and shot from her nose to her back where she couldn't reach him.
Sanbi roared as she shook, but Rosuto held on with one hand and started to create handseals with just one hand. Rosuto summoned a powerful earth technique which had been taught to him so long ago by his mother. A mother who was some fatal mistake as he felt it so... a mistake that he had made, though thankful she taught him anything at all.
Sanbi roared aloud again, shaking the trees of the small island the two Akatsuki had been standing on when the earth began to split apart... tearing itself wide open, and swallowing Sanbi and the Ninja. This was "Shoi no Sankyou", the jutsu Rosuto had been forming.
Now that Sanbi was stuck in this giant gorge, he let water fill in from the sides. Rosuto began to form more jutsu seals and turned to the water. He shot out his hands to the water and a blast shot from them, cold and deadly. Upon the beam hitting the rushing water, the water began to freeze solid. This jutsu was "Hyouton: Hyouketsu Hira Sen". A blast of ice that would freeze anything it hit and could also freeze large amounts of water. Sanbi was stuck there.
Rosuto cackled. "I never thought capturing the beast would be so easy." He said among the roaring that the gorgeous beast began to shreik out in anger and humiliation.
"Well, well, well, Rosuto-san. It seems you could have come alone, after all and it wouldn't have made any difference to you. But now you have to knock her out, Rosuto-san, how do you plan to do that?" Jin asked, peeking over the edge of the gorge.
"Like this!" The silver-haired missing nin responded by dashing forward so quickly that Jin didn't see the attack until it had finished.
Rosuto had struck the beast in the back of the skull, where it was vulnerable now, in it's raging. There was a moment of silence before the beast's head fell to the ground... unconcious.