The main character or main plot-driving character is the protagonist. Someone who opposes their goals is an antagonist--and often there is a "the antagonist" vibe, where the primary character opposing the protagonist is "the" antagonist. ... Bill and Ted's Excellent Adventure, for example, arguably has two protagonists.
Yes this is correct because a conflict is a problem they have between them and the aantagonist and protagionist are supposed to be enemies and have conflict
Is it the hardening of vessels becase of cholesterol deposits and so this can unfortunately cause heart attacks, strokes, alongside other serious conditions
