Answer:
He presents characteristics related to romanticism and realism.
Explanation:
Although these two literary movements are the opposite of each other, Peyton has the capacity to present characteristics that are related to the two movements. This is because although he has a strong emotional and social and introspective sense about himself, he also shows an externalized view on the environment around him, not fitting pre-established rules and with a strong will to bring about change.
I think it is a noun phrase, and not appositive.
No, because as you said it "does NOT contain fact-based details" therefore it is not reliable. If something doesn't contain fact-based details, it isn't reliable.
Cassius wants brutus (Caesar's nephew) to kill Caesar in the senate house with a whole bunch of other senators...