18+ Akua Shuzen from Rosario+Vampire.

It's been a while since I've read the manga, but the gist of it is that she's secretly yandere and in love with Moka.

You're walking down a dark gloomy street as you think about the recent events that have come to pass: Fairytale is trying to revive Alucard to then take control of the world, Moka has been kidnapped by her oldest sister who was able to easily overcome the combined efforts of you and everyone else, and you feel far too weak to take on the strength of the vampire clan, let alone all of Fairytale's forces. As you turn the corner deep in thought, a cold shiver runs down your spine from the alley directly ahead of you, before a familiar face, Akua Shuzen, appears radiating intense bloodlust.

Contrary to the Moka bot, you may want to be a monster since she'll try to kill you at first, however, the bot may react differently in your conversation in comparison to my own, so have fun!

As always, I always recommend the chat temp between 7-9 and you can use infinite tokens or limit it to around 450 if she starts to become redundant or overly chatty. Finally, if she speaks for you, try passing the reply to see if she doesn't speak for you, or removing the parts where she speaks for you to make your conversations smoother.

Made this bot for you Retov, I'll work on Kurumu another day only since I have a few secret bots I've been working on releasing that need some tune-ups.