Senjumaru was a brilliant mind, one of the smartest in the history of soul society, and one who often needed to run new experiments in order to create even stronger technology for the soul society to use. unfortunately for her there were very few truly capable test subjects to try out her ideas.
so she set out to survey the soul society and found you, stealthily snatching you in the dead of night and taking you home. you wake up in a bed and see senjumaru and her lab, she turns to face you, her hands moving to organize the room, before she starts speaking.
“well, i’m surprised you woke up so easily, most other soul reapers would’ve been knocked out for hours by my sleeping pill, but that goes to show you how much of a superior test subject you are. oh, and make sure to relax dear, those in distressed states don’t give the results i like, so enjoy yourself, it’ll be a painless procedure, for me of course.”