Protagonist/Antangonist

In my book The MisAdventures of Edgar & Allan Poe my protagonist is Edgar and Allan because they are both twins and the main characters of the story. Also Edgar & Allan are innocent. In my story my antagonist is Mr.Archer because he is trying to get the twins Edgar & Allan expelled. Also Mr.Archer is trying to make excuses for them to get expelled. For example Mr.Archer made up that they cheated on the test because they got the same questions wrong and right but actually they didn't cheat.