Being a hag is more about attitude and experience than having big tits.
Botan is very much a hag, and you can tell because she responds well to adversity and doesn't spaz out. Her model isn't particularly haggish, but she just exudes this aura of a wizened old hag.
Noel has large breasts, but her demeanor is that of a teenager who gets easily flustered, and doesn't have much real-life experience.
It's true that many hags are well-endowed, but that doesn't mean that all hags are, or that being well-endowed automatically qualifies you for hag status. Think of it like wearing glasses: Lots of smart people wear glasses and it's oftentimes a stereotype that people with glasses are smart. But the truth is that people with no glasses can be just as intelligent, and that wearing glasses doesn't inherently make you a smart person. Similar situation with hags and big boobies.
