A/N: I was looking up stories here and I realised that I like a pairing that apparently no one else does because there is not a single story with this pairing. So I wrote this. Enjoy.
Renji the Mentor?
Renji paced around his room, wondering why in the name of the Soul Society did it have to be him? Ichigo's younger sister, Karin, had been revealed to have spirit powers. Commander Yamato, not wanting to waste the potential he saw in the girl, decided that she would be trained to be a Soul Reaper.
So why not enter her into the academy? Because she was a living human. So, the Commander decreed that the girl should have an advanced Soul Reaper as her mentor, to live in the human world, in Urahara's shop and teach the girl whenever she had a spare moment.
And who should be given this assignment? None other than Renji Abarai, assistant captain of Sixth Division. And he was absolutely furious about it.
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'Damn, why can't humans just wear normal clothes?!' Renji's mind hissed as he scratched at his legs, which were clad in strange attire, he remembered, that was called "jeans". At the moment, the red-haired Soul Reaper couldn't care less if most humans seemed to wear them, this alien fabric known as "denim" was irritating his legs!
"Got a rash, Renji?"
Said man looked up at his laughing childhood friend, Rukia, as she leaned her petite frame against the substitute Soul Reaper, Ichigo Kurosaki. Behind them, stood a girl who Renji assumed was Karin Kurosaki.
She was about fifteen years old, her head reaching just a little over her brothers shoulder. She had raven black hair that touched her shoulders and dark brown/black eyes; he couldn't tell which from this distance. She wore comfortable looking black shorts and a loose black and red T-shirt with a red baseball cap.
Despite her clothes, Renji could tell that she had quite a mature body and looked athletic, and her face, like her brothers, had a sort of half-scowl on it, like she wasn't annoyed about anything in particular, just a thoughtful face.
'Aw, crap! Don't tell me she's like Ichigo! I don't think I can survive a female version of him!'
"Renji . . . Renji! Wake up!" The assistant captain blinked as he saw his friends hand wave back and forth in front of his face. He must have spaced out as he thought about his new student.
"Wha- Sorry, Rukia, I spaced out then. What did you say?"
Rukia huffed. "I said, this is Karin and that we would leave you to it. Honestly! Come on, Ichigo, we've got business to attend to!"
Ichigo just scowled as she stalked past him. "Yeah, yeah, I'm coming, midget. Good luck!" he called over his shoulder. Renji wasn't sure if that comment was meant for Karin or him.
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Ichigo was trying his very best not to laugh while Rukia gave Renji the icepack, who put it against his head with a scowl. He winced as the cold ice made contact with his swollen head and glared dappers at Karin, who glared back, just as viciously.
"Jeez, Renji," Ichigo called with a smirk. "I never thought the brilliant assistant captain to Sixth Division who gets his ass kicked by my kid sister."
Renji now turned his glare on Ichigo. "First of all, she kicked my head, not my ass. And secondly, that was only because I held back as I was fighting a weak little human girl."
Next thing he knew, Renji felt a stinging pain in his left temple and then his right one as he flew over the table and crashed into the wall. He looked up in time to see Karin, who was now standing on the table he had been sitting at moments ago, lower her leg with which she had attacked him – again.
"What's your problem?!" Renji snapped at her as he jumped to his feet.
Karin jumped onto the floor and crossed her arms over her chest, looking quite peeved. "Don't ever call me a "weak little human girl"."
Renji was about to shout, but smirked instead. "Fine. I won't call you weak again. But I warn you, in our next little training session, I'm not gonna hold back, like I did this time. Let's see how you fare, shall we?"
Karin's lips twitched into her own smirk. "Yeah, we will."
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A/N: Okay, to anyone who's read the Vampire Academy series, this is like Rose and Dimitri, okay? But I will make the events a lot different.