The Murderer Is After the Brown-Haired Young Lady

I transmigrated into a novel where a murderer targets only women with brown hair and green eyes. And I became that very noble lady with brown hair and green eyes. To avoid catching his attention, I shut myself away in my workshop and lived like a potion-making machine. If I could just hold out for six more months, the original protagonist was supposed to defeat that murderer... “I am Eon de Grannoy, Master of the Magic Tower. I have come to take you with me.” The murderer from the novel appeared right in front of me.