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.
Kasen's right armHER DARK PASTKyaah~! Ibaraki-sama is amazing! You're just the coolest!I can feel your evil energy rippling!Wouldn't you look the absolute coolest if you said that line for me!? Come on! I just love that one!"Only the virtuous, saints... and the most wicked can live above others... (hot guy voice)"I'm still gonna devour you whole like an oni!You gonna become one of the skeletons too?