User blog comment:AK151/RWBY Villain Speculations/@comment-10390252-20140707151723/@comment-24994749-20140707190645

For the Ozpin part, I say, seeing how he already has grey hair (unless that turns out to be his natural hair colour), I think he fought in the Faunus Rights Revolution, on the side of humans, obviously. War that I personally headcanon ended around the times of the students' grandparents. Now Ozpin accepts faunus into Beacon out of regret of possible horrible things eh did to the race during his times as a soldier.

As for you theory of the three villians, maybe Summer was the 4th team member? But I think Emerald and Mercury are too young, seen as they will be sneaking into the tournament to fight with the students.

Though I do have a theory about Roman being linked to Summer's past.