It's what comes after To think otherwise merits laughter Not before, and definitely not pre That almost gives it away, wouldn't you agree?

My first is the antonym of heavy. My last another word for dwelling. Together I'm a tower with a panoramic view.

I speak without a mouth, I hear without ears, I spin your words back around at you, And you might find my voice unfamiliar

I am from the darkness. You cannot run from me, I am a part of you forever. What Am I?

A migratory animal, a colour and a sushi ingredient. Remove the first letter, and add a different consonant to the end, to get a type of nut. Reversed, it sounds like biting a girl.