Karin can't be bothered to worry about the strange girl Ichigo keeps in his closet. She's the type of girl to stay in her lane, bury her head in the sand and forcefully move the Ouija board in another direction- Even though the ghost of Homura-san is Very Displeased with her because of it. The other girls at the slumber party should thank her.
But eventually, even Karin has to notice the changes in her brother. He laughs more these days, though his life has never been harder. He takes more of an interest in her- though she could do without it. He's all around better. She wonders why that is.
Until she doesn't have to wonder anymore.
Karin can't be bothered to worry about the strange girl that Ichigo brought home with him. Goatface seems to like her a lot, but Karin knows a liar when she sees one and it's none of her business. She just stays out of her way.
But eventually, even Karin has to notice the way the chipper smile cracks at the edges. Rukia is a melancholy woman at the oddest times. If there's more to the stranger than bunnies and kicking Ichigo in the shin then, well, power to her, but it's not for Karin to worry about.
Until it is.
There's a war on and Karin's older brother is on the precipice, toppling over from life into death and Karin wonders if that will finally make her brother happy.
That is something Karin worries about constantly.