>>279901973
>Hanadori Rouka
She's just the person that Numachi got her Rainy Devil leg from.

>what is the deal with Numachi Rouka
I've never really understood Hana either. Maybe Numachi shows her what could happen if you let your regrets over things that you have lost turn you into a cynical bitter person, which would tie back to the terrible advice advice that her mother gave at the start "If you can't be medicine, you should be poison".