Mishima Yomu is a good writer, but his frothing hatred of little sisters is ridiculous.
First Marie in Mobuseka, deliberately written to be unlikeable. He was, by his own admission, shocked and horrified when polls confirmed that fans liked her.
Then the little sister of the MC's best friend in Intergalactic Empire. Written to be even more annoying and unlikeable. Fans still thought she was funny.
Now this. I can't take this character seriously because all I can see is the author standing behind her, jumping up and down while screaming "HATE HER DAMMIT"
Yes, fine, congratulations, you've written an actual psychopath.
WHO HURT YOU?