One of my favourite things about kasen is that her entire backstory is just 100% a chuuni thing.

She’s literally an evil demon general whose evil powers were sealed away in her accursed right arm, and now she's trying to find the last remains of her evil powers to be whole once more...

And then you look at her public presence and she's literally trying to do the absolute reverse of what any actual chuuni does, it's great.