Only Blair was somewhat a bit equal to Seiya in terms of popularity because she was a girl, she was lovely, but she was unexpectedly strong.
There were many strong women and older people in the ability user's circle, but it was indeed uncommon to see a little loli being cute yet strong.
Isn't that the reason why Ainsley became popular all over the world? The huge contrast is what makes her unique.
With the two older brothers fanning the fan, Blair was often compared to Seiya and each kid had their own 'fanbase' when they had not even officially joined the academy.
Of course, because of Ainsley's popularity outside of the academy, many people also compared Blair to Ainsley, but there was indeed no comparison at all.
Ainsley still crushed every single child prodigy both inside the academy and outside.