Answer:
Its denotation is "personality;"; its connotation is "unavoidable."
Explanation:
I took the quiz before
Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
Did you mean to include a link to a story? :)