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
