A soliloquy<span> is an utterance or discourse by a person who is talking to himself or herself or is disregardful of or oblivious to any hearers present (often </span>used<span> as a device in </span>drama<span> to disclose a character's innermost thoughts). If there are others on stage, it is a protracted aside.</span>
It can’t be a smilie because nothing is being compared using like or as. It can’t be onomatopoeia because the following words is not used in that quotation, POW, WOW BOOM etc. It can’t be metaphor because nothing is being compared without using like or as, and it can’t be rhyme because nothing in here is being rhymed so it has to be Assonance.