In Harrys 8th year all 8th and 7th years finds out weather they are a omega, alpha, or beta. Omegas are supposed to submit to there alpha while alphas are controlling and cruel. Betas are not really much of anything. They get normal relationships and no soulmates. Though that is not what happens with Harry and Snape. Ps. Fred is alive, So is remus and sirius. Remus is dada teacher, severus potions.