Despite the test's nature, she wasn't supposed to help Naruto or his teammates, but the Uzumaki clan doesn't abandon their own.
Especially when she sensed that Naruto and Sasuke chakra were erratic like they were in a hard fought battle, but then it went silent like they were near death. She knew her teammates were going to be pissed at her for leaving them, but she had to make sure Naruto was okay. Besides, they can't be too mad at her. After all, her sensory abilities allowed them to track down a heaven scroll they had to do was get to the tower and lay low. But now she had to get to Naruto and his team.
What made it a pain was that she and her team had started so far away from Naruto's team. She was closing in but it felt as if she was still so far away. It didn't help that multiple new chakra signatures had closed in on their location and gave off the feeling of battle. Lee's and Naruto's teammate, Sakura were easy to pick out given she knew Lee at the academy and made sure to familiarize herself with the chakra signatures of Naruto's the others, Karin needed a few moments to get a solid read on them, but she was able to recognize them as the sound ninja and some Leaf ninja from Naruto's class. As she approached she picked up Neji's and Tenten's signatures as well. Made sense since if they weren't with Lee they were bound to come looking for him. But then there was that dark evil chakra that had been building up for a while. That worried her more than anything. It didn't feel the same as the one before that alerted her to Naruto being in danger.
Then she finally arrived at the clearing, which coincidentally had been at the same time Neji and Tenten had arrived.
Which led to a bit of verbal banter, but then all hell broke loose.
The dark evil chakra was coming from Sasuke and he was awake.
That sound ninja with the face plates had to be completely blind or an absolute idiot. Even if she wasn't a sensory type the dark evil chakra was plainly visible even to the naked eye. Even his teammate was trying to warn him.
Then the idiot launched his attack. Which even she had to admit was an impressive display of raw power. Though something was unnatural about it.
Sasuke had managed to avoid grab Naruto and Sakura, and take them to safety. Not just safety, but they were right behind the sound idiot.
Sasuke hit the sound idiot and sent him flying.
Sasuke then launched a Fire style jutsu and when the sound idiot tried to blow away the flames, all it did was reveal the shuriken. Which had enough momentum to slice the idiot up. Idiot got lucky as the trajectory had been thrown off, preventing a lethal hit.
Sasuke then appeared behind the Sound idiot and put his arms in some kind of hold, threatening to break them. A threat he absolutely followed through as even Karin could hear the snap of bone and following screams of pain from her position.
The Sound idiot passed out from the pain and was on the ground.
Sasuke then turned his attention to the remaining Sound ninja.
Sakura yelled, "Sasuke! No! Stop it"!
She tried to run to him but collapsed. Too drained to even walk to him.
Sasuke gave Sakura an evil look as he turned his head.
It was a look of a beast mad with bloodlust. Karin figured now was as good a time as any to test her chains' ability to suppress chakra. Karin leapt down from her position, summoning her chains. She performed a set of hand seals. The chains came from her body and as soon as she was in range of Sasuke, she sent her chains to bind and suppress his chakra and movements. The chains completely wrapped around Sasuke's limbs and body. Completely shutting down his movement.
For a few heartbeats Karin wondered if her chains were even working. Then it happened. The evil chakra and black marks were subsiding and the chakra had even stopped being visible to the naked eye. It wasn't long before the chains had suppressed his chakra to the point he couldn't stand. Which convinced her to recall her chains.
The remaining Sound ninja said, "You're strong Sasuke. Too strong. We can't beat you as you are now. We'll strike a deal. We will give you the scroll and you let us go".
This shocked Sasuke and Sakura.
The Sound ninja continued, "It seems we underestimated you. But at least we found out what we needed to know. For the moment we are even, but if we ever meet again in combat, I promise you, we will not run or hide".
He grabbed his fallen teammates and began walking away.
Sakura called out, "Wait! Who is this Orochimaru?! What did he do to Sasuke?! Why Sasuke"?!
The sound ninja replied, "I don't know. All we were told is to target Sasuke and we did".
He continued walking away.
Karin sighed. It was over for now.
She heard a shout, "Sakura, are you guys okay"?
It was Naruto's classmates.
The Yamanaka girl's teammates spoke up, "You check on Sakura, we check on Lee and Naruto"!
Neji and Tenten leapt down to do their own checking on Lee.
Karin took a moment to breathe before hearing Naruto talk in his sleep. Then a loud clunk. Apparently the Nara and Akimichi clan's idea of checking Naruto was hitting him in the head.
Karin said, "I know he is a thick headed idiot, but can you not hit him in the head. He has precious few brain cells as it is".
Karin had to laugh as Naruto immediately focused on Sakura's hair.
Karin turned her head to look at Lee, apparently the Nara and Akimichi kids learned first aid from Tenten as Tenten just shook and yelled at Lee.
Karin called over, "Just bring Lee over here, I know some medical ninjutsu".
Tenten brought a confused and dazed Lee over to her.
Karin said, "Alright, let's start on the most injured".
Naruto then decided to act like an idiot again, with his typical stupid nicknames. Which earned him one solid hit from Sakura. Karin had to admit that Sakura was really growing on her.
Karin began healing Lee with the mystical palm jutsu.
Ino called out to Sakura, "Hey Sakura, come over here. Let me fix your hair".
Despite being an Uzumaki, Karin still had to conserve her chakra. If there was someone or something that could take down Naruto then she had to be careful. Naruto had tapped into the power of the nine-tails and he still lost. Then of course Lee had been injured pretty badly against those Sound ninja and of course they were still willing to fight after fighting a fresh team. Even if she avoided whatever Naruto took on, she would have to be careful.
