The Betrayed Hero Who Was Reincarnated as the Strongest Demon Lord - Vol. 3 Ch. 8 - The Wind Sacred Edge

[MangaDex]

 

[Coldlight]

It's unfortunate that Ludmila is a (fellow) victim of "family members lost to murder in childhood" like him, but seeking revenge. But at least she's not dishonorable enough for the underhanded tactic of targeting Stella. IMO she's a better written antagonist than Lyle who's just a comically evil traitor-type villain.

But did they really have to make her piss herself? That's just... crass. There was a better way to show her the kindness of demons, but yeah... I guess it's something something author's barely disguised fetish or something along those lines...