Sonichungergamesfangirl – HA! Yea, I wouldn't hold out hope for either of them to admit their feelings anytime soon.

Title: Test Subject

Theme: Learning

A/N: This may be a bit of a boring chappy. Sorry. This is going to be more informative than anything. It is going to explain the headcannons I have about the extent of Rin's abilities. So just bear with it. ^.^ (Plus its just fun messing with Rin.) It's also a bit long, I got a bit carried away.

"Biology of Demons will be canceled for the rest of the semester." Koneko read from the note posted to the classroom door.

Rin tail stood straight up.

Bon grinned.

Shima turned to Rin and Bon. "You wouldn't happen to have had something to do with that, would you?" He smiled suspiciously.

"'Bout time that bastard was fired," Bon said smugly.

Yukio then showed up behind them. "Yes, well, because there is no longer a professor for this class," the exwires turned towards Yukio, "I will have to assign you all something to replace the class." Yukio pushed his glasses further up his nose. The light reflected off his glasses, obscuring his eyes and creating a somewhat evil look about him.

Bon's smile suddenly disappeared.

A few minutes later and they were all in Yukio's classroom. "Since Professor Yunokawa is no longer working here, you will need something else to take the place of your biology credit. Therefore, I have come up with an assignment for you all to do." This will be perfect, he thought, and maybe Rin will actually learn something as well. He smiled then cleared his throat and continued, "As a group, you will all question and study Okumura."

The whole class got silent then stared at Rin. Rin looked around a bit frantically then shrunk a bit in his chair. His tail curled in on itself.

Yukio smiled. "You will use him to study the different characteristics of a high class demon as well as his strengths and…" he paused and looked at Rin, "weaknesses," he finished.

Rin's eyes got wide and he shrunk a little more.

"At the end you will do a seven page essay, as a group, over what you have learned, including you Rin."

Nobody really knew what to say after that.

The next few days were spent at the Okumuras' dorm with everyone focusing on Rin.

"Well," Koneko was the first to break the silence, "We have already started learning some things the other day before the power went out."

"Yea but that was different. You all were just curious. Now I feel like I'm being used as a test subject." Rin crossed his arms and looked away. His tail was flicking indignantly.

"Well you kinda are being used as a test subject, and by your own brother." Izumo smirked.

"Damn four-eyed mole face," Rin mumbled with a small swish of his tail.

"But, in all honesty, we really are just curious," Bon added

"Yea, we want to know what the extent of your powers really are. Aren't you curious to test them too?" Shima cut in trying to get Rin on board with their assignment.

"Hmmm." Rin thought for a moment. "Yea I guess that sounds good." He smiled.

Shiemi spoke up. "So where should we start?"

"We could start with testing his five senses, then go from there," Koneko suggested.

Rin slumped and his tail hung limp.

"First up is your sense of hearing," Koneko announced. He and the others had moved outside the abandoned dorm. "Each of us will stand at different distances from you and say something. Repeat what we say until you can't hear us anymore."

They performed the experiment with Koneko taking notes as they went. At the end, they concluded that Rin could hear voice level sounds up to about 100 meters away and smaller sounds, like a whisper or even a heartbeat, up to about 20 meters away. Koneko also noted that his hearing isn't like that all the time; Rin has to really focus to pick up certain sounds at certain distances.

"Next up will be your sense of touch," Shima announced. The exwires were back in the cafeteria of the dorm, sitting around a table.

"How are we going to test that?" Rin asked.

"Well first we have to be able to compare it to a human's sense of touch," Izumo responded.

"So, one at a time, we will each be blindfolded to feel five different objects with similar textures and guess what they are. We will record how many we get right," Koneko added.

"Then we will do the same with you and record how many you get right," Bon finished.

After the experiment, the results showed that the exwires only got one or two correct whereas Rin was able to correctly identify all five objects just by touching them.

They did a similar experiment with taste and got similar results. Rin, however, tried to say it was because he was just that good a chef. They noted what they learned about his eyesight when the power went out, as well as testing it further. Then they proceeded with a test for smell.

"Geez! Your nose is like a blood hound!" Shima commented when Rin found him from over a mile away.

"Well, that accounts for all five of your senses," Bon concluded.

"It seems that all of your senses have been extremely heightened." Koneko was writing in his notes.

"So what's next?" Shiemi asked.

Izumo walked up behind Rin and gently grabbed his tail, sending shivers up Rin's back. She smiled. "Next is his tail."

Rin flinched and froze. "Uh… we can just skip my tail right?" He smiled sheepishly

"Not even! That's what we are all most curious about!" Bon smiled and shoved him a bit.

Izumo quickly let go to avoid pulling it.

Rin caught his balance then slumped. "What do you want to do?" he resigned.

"We can start with testing your tail strength and physical strength together," Koneko began. They were all back outside.

"We have already seen a bit of what you can do when you moved Bon's chair like it was nothing." Shima sounded impressed.

"And we've seen your physical strength, too," Shiemi added excitedly.

"So what do I do?" Rin was still slumped.

"Lets start with your attack power." Bon ushered them over to a large tree. "We won't got into specifics and just use our observations. We'll start with physical strength." He pointed to the tree. "Punch as hard as you can."

Rin perked up and smiled, his tail wagging behind him. He planted his feet firmly in front of the tree and took a fighting stance. He reared his fist back and, with all the strength he had, punched the trunk of the tree. The trunk shattered into splinters and the tree fell to the ground.

"Wow," all the exwires said simultaneously.

Rin stood up with his chest out and hands on his hips, his tail standing up proudly.

Bon punched him in the arm. "Don't get cocky." Bon smiled. "Now use your tail."

Rin took his stance again in front of another tree. With a graceful spin, he thrashed his tail at the tree. Visually, it was almost as impressive as his punch; the trunk shattered into thousands of splinters. There was a large crater left in the trunk but the tree didn't fall.

"I'd hate to be on the receiving end of that." Shima was staring in awe at the trunk.

"Well, that was awesome," Bon added simply, "how about instinct?"

"Huh?" Rin looked at him with a puzzled expression.

"Well, demons have a certain instinct right? Like a 6th sense?" Bon explained.

A little bit later and Rin was blindfolded and they were all back in the cafeteria of their dorm. Izumo and Shiemi had summoned their familiars and Kuro was there too.

"Ok we will start with something simple," Shima began.

"We are all going to start waiting in the hallway. At random, some of us will come into the cafeteria," Koneko explained.

"When you hear a bell ring, try and name as many of us that are there," Bon instructed.

They did five rounds of this and each time the bell rang, Rin got all of them right.

"Ok, so now we are going to attack you." Izumo said flatly.

"What?!" Rin exclaimed.

"Yep. And you can't use your sword. You just have to avoid us and our familiars." Izumo smiled.

Rin sighed and took a stance. Kuro was the first to attack.

Hehehehe. Kuro crouched down and then pounced. Sneak attack! Kuro yelled in Rin's head.

Rin took off his blindfold. "Kuro, sneak attacks don't work if you yell it out loud." Rin looked Kuro and put his blindfold back on. The other exwires just laughed.

After that, the attacks came one by one and Rin expertly avoided all of the attacks thrown at him. At one point when Uke and Mike attacked him, Bon took advantage of the distraction and tried to sneak up behind Rin. Instead, however, he ended up on the receiving end of an attack from Rin's tail. Bon flew backwards and into a wall. Everyone froze.

Rin took off his blindfold. "Bon?" He looked around and found him on the floor. His tail cringed when he saw him. "Bon! I'm sorry! My tail kinda did that on it's own before I had a chance register who was behind me."

"I-it's alright." Bon breath cam in short heavy pants. "I… just had the… wind knocked… out of me. I-I'm fine." After he regained normal breathing he stood up and they ended that test.

"So what are we testing next?" Rin asked, a bit uncertainly.

"I hate to say this, but Mr. Okumura did say we have to test your weaknesses."

Rin began taking steps back and was about to run for it when he bumped into something. He looked back and found Izumo behind him. "Where do you think you are going? You know we have to get this done to get that credit."

"Don't worry about it." Everyone looked at Bon. "We shouldn't force him to endure tests that might hurt. I'm sure we could still get a C or B with the information we have already gathered." Bon's face looked sympathetic but disappointed at the same time.

Rin sighed. I know how badly Bon wants to have the highest grade on anything he can. "Alright, I'll do the tests."

Bon looked up. "Are you sure?"

"Yea." Rin's signature goofy grin spread across his face and his tail was wagging from side to side. "I'm a fast healer anyway."

Bon smiled.

"Time to test holy water." Shima walked in with a small bottler of holy water.

"I have already seen what a holy water grenade can do." Bon told them about Shiratori.

"So now we need to test what direct contact will do to his skin and his tail. The grenade releases a vapor or mist which might have different effects," Koneko informed them.

Bon sat down behind to Rin on the floor. Rin leaned into him. Bon held out Rin's arm with on hand and held Rin's other hand with his other. No one else could see them holding hands however, but everyone knew they were and just didn't say anything. Shiemi stood back watching with a worried expression. Shima filled the cap of the bottle with the water and held it over Rin's arm.

"Ready?" he asked Rin.

Rin shook his head, closed his eyes, and squeezed Bon's hand a bit.

Shima poured the cap and immediately, smoke rose from Rin's arm and the area affected broke out in a severe burn. Bon cringed, not only at the sight of Rin's arm, but also at how hard Rin was squeezing his hand behind his back.

"Nii, I need some Mr. Sancho please," Shiemi called to her familiar.

"Wait." Koneko stopped her. "We need to time how long it takes to heal on its own."

They all sat quietly around Rin. Koneko held a timer. After a couple minutes, they began to talk to get Rin's mind off the pain. About 30 minutes passed and his arm was finally completely healed. Koneko recorded it in his notes.

"Now we need to compare that time to the healing time of a regular injury, such as a cut; an injury not inflicted by a demon specific weapon."

Bon looked at Rin. Rin nodded. Bon pulled out a pocket knife and created a cut about 4 inches long across his arm; he never let go of Rin's other hand. Koneko started the timer. This time it only took a minute for it to heal.

"We have to do this same test to his tail, is Rin will allow us." Koneko looked at Rin sympathetically.

Rin nodded then said, "This time start with the cut then go to the holy water."

Koneko nodded.

Rin's tail curled around his waist and into Bon's reach. He then, reluctantly, cut Rin's tail like he did his arm. Small blue flames sparked off Rin in every direction for a minute, but never burned Bon. Bon however was in pain from Rin squeezing his hand so hard. Koneko started the timer. The cut healed in about 30 minutes. Then Shima poured another cap full of holy water and held it over his tail. He looked at Rin and Rin nodded then shut his eyes. Shima poured it and immediately Rin burst fully into flames and everyone backed away. Bon gritted his teeth when Rin broke his hand. Rin screamed then passed out; his blue flames continued for a moment then slowly died down. It took almost 12 hours for his tail to fully heal. During the time he was passed out, Shima moved Rin to his bed and helped Bon bandage his hand. No one asked how that happened to Bon and they just let it go. While Rin rested, the exwires began putting together the paper for their assignment. As they were reaching the end, Rin had woken up feeling better and helped them finish the paper.

The next day in class Koneko handed the paper to Yukio as he walked in. Yukio read it over, making the occasional comment.

"Nice observations, Miwa." Yukio read an excerpt from their essay. "'Okumura's tail not only serves has one of his strengths but also his greatest weakness. Not only that, but his tail tends to have a will of its own sometimes and also reveals what Okumura is feeling even if he is trying to hide his emotions.' That is an excellent point." Yukio continued to read through paper. Then he paled a bit. "Uh… I didn't quite mean for you all to actually test holy water on him. I just wanted you to put in possible weaknesses based on his class, type, and everything else you have learned in calss."

All the exwires looked at each other with pale faces and a wave of guilt hung over the class.

So this was basically my thoughts on what all his abilities were. I was going to add in a part about his agility and balance but I didn't want to drag it out much longer. But basically, he has higher agility and balance and his tail is part of what helps with that. So if his tail is injured, it throws him off balance a bit. Kind of like a cheetah. Everything in this chapter should hold true through out the rest of this fiction. Sorry for the long chapter but I wanted it in there somehow. 6 down, 94 to go. Read and Review! Until next chapter,

Cas-Winchester13