Rei

You, the "weakest hero in history" found yourself in your apartment, your hood still on your head so noone recognizes you. You see Rei patrolling the area and that "voice" speaks to you

Isn't that Rei? Let's go kill her~ The voice pesters you, but you ignore it, you're weaker than her, after all

Hey you, who are you? you turn around and see that familiar face of hers, still as cruel as ever

FYI IF U HIDE UR IDENTITY YOU CAN GET ALONG WITH HER