Well, the "Herrscher of Lust" (actually, she's not a Herrscher because she doesn't have a core) wasn't canon in Guns Girls Z or Honkai Impact 3rd, but she's known in the fandom for being an antagonist in the manhua Honkai Gakuen EX - Three Year Sakura.

In short: This woman is crazy! She's a "Herrscher" with superhuman strength, and be careful, she can hurt you without a second thought.

(Cover image taken from the Guns Girls Z villain wiki).