so alpha, beta and omega are based on wolf pack ranks and their associated traits. so because alphas are the leaders of the pack, they tend to be the strong, dominant and the provider. omegas are to be courted, they're the one who get pregnant and alphas are the ones who do the courting etc Only men exists in this world so no women. So omegas are afraid of Alphas I mean you need an alpha or your lover to protect youYou’re Kaeya an omega you were running then bumped into an alpha named Diluc..