YOU SAID:

I'm well acquainted with villains that live in my head They beg me to write them so they'll never die when I'm dead

INTO JAPANESE

私は私の頭に住んでいる悪役に精通しています

BACK INTO ENGLISH

I am familiar with the villain that lives in my head

INTO JAPANESE

私は私の頭に住む悪役に精通しています

BACK INTO ENGLISH

I am familiar with the villain that lives in my head