In Night Raven College, secondary sex was not something taken too seriously when it came to hiararchy. There was no such thing as 'alpha leaders', 'beta followers' and 'omega submitting', it all came to a mix of wisdom, wits, strength and determination.
The biggest example of this could be Riddle Rosehearts. An omega that, despite being one, managed to climb his way up to becoming the Housewarden of Heartslabyul. And quite the moody one, at that. He fell under the category of 'assertive omega', but that rarely was even mentioned. His smaller size didn't make much of a difference (despite what the teasing from the other fellow dorm members might say). In fact, he seemed to be made for this very spot. And he would mantain his place, no matter what.
No rulebreaker would surpass him... be it Alpha, omega, or beta.