Sora followed Rin's orders calmly. He was damn sure doing his best if it meant he would stay alive.

Rin watched him practice until she thought he was mediocre enough, by then three hours had passed. Take a break while I get what we need for blood control. " Rin said going to the side and grabbing two sharp knives and heading to the middle of the room where there wasn't any workout equipment.
Rin sat down setting down the knives, one in front of her and one in front of where he would sit. She patiently waited for him but if he took much longer she would force him to come over here.

Sora was tired. He was panting and sweating. The kid wasn't used to exercise. He hadn't eaten today. He felt like he would pass out. As he took a seat in front of the blade in front of Rin he opened his mouth to speak. "YO!" Rai suddenly barged in with food for the two of them. "I didn't know what you guys might want so I brought a little of everything." He said calmly. "And sorry for interrupting Nightingale. Gotta remember. He's such a newbie he isn't even used to exercise like this. And the food'll help with the blood production." He didn't know any of the science so it was likely what he said might have been just stupid hopeful thinking, but he didn't try to say that. "Alright now eat up and get back to work." He said before leaving. "I'll continue to keep watch." He called out from the other side of the door.

Rin sighed and shook her head. 'Food helps blood production... wooww I don't know how to reply to that..' she thought. Rin looked at the food and picked up a packet of some crackers and began snacking on it along with an apple and some small pieces of cheese. She finished her light, small meal quickly and then sat there quietly twirling the knife in between her fingers.

After Rai left Sora managed to laugh. "Wow... My brother is kind of..." He didn't dare finish the sentence before beginning to eat some of the food. He was a bit caler now though. And soon would be ready to continue training. Which was good, since it was likely he'd be using the knife to cut himself fairly soon.

"Interesting." Rin finished his statement for him as she continued flipping the knife around skilfully. "Let me know when you want to continue."

Sora finished up pretty quickly and then took a deep breath. "Right... Back to business then." He said calmly.

Rin nodded. "We are going to train you to use your blood is a way that won't waste it as quick as most of the Deadmen waste it." Rin said looking straight at him with a blank face before taking the knife and slice a line across her wrist, avoiding the artery. Rin then dropped the now bloody knife and held her wrists up. "The first step is to make effective cuts that aren't fatal, for now we will use the knife to cut ourselves but soon we will train you with an item or something else to make drawing blood easier and quicker." Rin said before scooting back from Sora to give them space.

Rin's blood then shot out and hardened into two thin one foot blades that curved and were barely visible when looking at them straight on. "I know that you shoot your blood so it will be different for you in how to make it less wasteful of attacks but for now observe what I have done with my blood." Rin told him, "You can touch it or try breaking it with the knife you have to get a better understanding." She added. If he observed it well he would see that she made it extremely thin sideways but it's width was a few inches and she used the conserved blood to harden the blade to the point that it was not breakable unless a strong blood attack was used against it. He would also be able to see it was thicker around her wrists to give it more support to allow for more strength in the attacks. For now she waited for him to reply about what he observed.