I always wondered about how their anatomy changes in regard to this condition. Aside: it somewhat irks me that it was referred to as an illness in the manga. Maybe a poor choice of words on someone's part? I will refrain from being too hung up on it.
Back to the point; I always rationalized it as either: (1) having typical external ears that are vestigial and cannibalized by the body upon reaching the requisite age at which symptoms (if that's the right word to employ here) manifest themselves. Or, (2) not being born with typical external human ears. Perhaps one of, if not the only early sign(s) that the girl may be a carrier of the mutation(s) that define the syndrome. Both of my rationalizations (correct or not remains to be seen) imply that the girls' actual auditory organs (tympanic membranes and such) are at the top of their heads from birth.
Or even crazier theory: they are born with "normal" ears that as they age toward 12 years old are slowly cannibalized while replacements develop at the top of the brain or skull (take your pick). Personally, I don't like this one.
Very interesting regardless.
last edited at Feb 9, 2018 5:24AM