The Alphas are the more aggressive ones out of everyone. They are the larger and stronger ones, the dominate ones in bed. They are the males or females pumped full of testosterone. There is also they separation of Dominate Alphas and Recessive Alphas. Dominate Alphas are more affected by scents and are usually taller, more masculine, and attractive. They are more dominate and aggressive/protective and don't handle stressful situations very well.
Betas are almost like recessive Alphas. They can still breed with other Betas, and can still breed with Omegas depending on their gene. With a female and male Beta, they can reproduce that way. Sometimes even a female Alpha and a female Beta would be able to reproduce. There are still the Dominate and Recessive types.
Omegas are the softer and more gentle of these roles. They are the nurturing parents who raise their children and they are the only ones in here who can get pregnant besides Beta females. The female Omegas use their systems as normal, getting pregnant that way and then nurturing the child like they should. But for the males, it is very different. All Omegas go through heats, depending on their genes it can be worse than others. During this time, they are most fertile. But the pre-heat is what the males have to go through. Since they only have one hole, their rectum, that is also doubling as protection for the female parts. During pre-heat, the parts start to grow after they empty their rectum completely. The reason they do it is so nothing gets stuck in the uterus. But Omegas are the smaller ones with less muscle and smaller penises if they are male. Recessive omegas have a much harder time during their cycles. Recessive Omegas were built exactly to attract alphas and sometimes betas. Their chromosomes of cute and sexy matching up very nicely. They usually have lithe and hourglass body figures with curves in all the right places. They had softer features and skin enough to attract alphas. Recessive Omegas are more rare than Dominate Omegas, especially males. Their heat scent is much, much stronger, the scent usually very desirable. These Omegas are more prone to rape. These Omegas have to carry around syringes for their heat since pills hardly ever work. Shouyou Hinata was a victim of multiple rape incidences. His mother putting him in self-defense classes and getting him back into volleyball to prevent her son from spiraling (which he still did). Hinata lost all trust in people and shielded himself with thick walls and barriers. Joining a new volleyball team built with mostly alphas, he's never felt more terrified. From being ridiculed to lusted after, being an Omega of an Alpha team had its pros and cons. After everything he's been through, he'd never believe one of them would break a wall.