Seriously,
Interview with monster girls had a much better portrayal of a dullahan in the modern world.
This dullahan-chan should be long dead or turned into a vegetable at best just from all the times she dropped her head.
Either that or she's actually invincible so this isn't a concern.
I know this is more comedic than that other manga, but she really has no sense of care (literally zero) for her head despite expressing fear of her heading being lost in a river... or a toilet.
This is completely breaking the fun for me.