Chapter Text
They teach you a lot of things before they let you call yourself a medic nin. Anatomy, chakra systems, how to break people coldly and efficiently, how to put them back together,...
Most of it is fun. Rin enjoyed almost all of her lessons during her two-year apprenticeship at KHS (Konoha Shinobi Hospital). However, there are always a few skills you hope you'll never have to use. On anyone, let alone your best friend.
She'll probably throw up once she's done, a part of her notes, while slowly feeding chakra into another capillary in Kakashi's eye socket. The work is both miniscule and infinitely delicate. Her focus is rock solid, despite the broken, gurgling gasps coming from one of the bodies at her feet and the dry sobs coming from the other. One vein left. That's all the physical connections. Kakashi's face is still pretty, despite shiny pink scar now over his left eye. The eye itself is dark. Black, for now.
She wipes her hands on her skirt. Blood smears mar the pretty white fabric in the shape of a child's hands. (She's an adult by law. She will finish her job.) Connecting Kakashi's chakra systems to the new eye is a snap. She's a little surprised that his body accepted it so easily, but he's done.
Obito will not be so easy to fix.
"Kakashi. The cave is unstable. Go." He blinks at her. One eye silvery grey, and the other spinning in a mesmerising twirl of red and black. He'll be chakra exhausted in minutes if he leaves the sharingan on, she notes. He nods, and pulls his forehead protector down to cover his eye. It stretches a little, but stays in place. He looks more like himself without Obito's eye.
"I'll meet you outside. You have thirty seconds to say goodbye." For once, he's smart enough to simply walk out. He's on the verge of collapse, and anything more strenuous would knock him out.
She turns to Obito. He's small, objectively. Huge compared to Kakashi, but still has the short fingers and full cheeks of a soldier on the wrong side of puberty. He's sightless, now. His one good eye scavenged to be used as a weapon by his soon-to-be-former teammate. Half his body is crushed under tons of rock and they have no backup within a two-day range. Even if they did, there would be no fixing this. Not unless you had a significant supply of the Shodaime Hokage's miraculously regrowing cells or access to Tsunade of the Saanin herself. Probably not even then.
His breaths are still gurgling. There's blood flooding his lungs. It will probably be that that kills him, since he's automatically slowing the blood loss with what little chakra he has left.
Rin grabs a kunai in her left hand, and presses a kiss to his bloody forehead.
"I'll see you in the peaceful lands, my friend." She stabs him in the heart. The poison coating the blade is not the most painless she carries, but it is the fastest-acting. Obito is dead before the next blink of her eyes.
She walks out, and the cave collapses behind her.