@blaquisita -the eyesocket is a caved in area
-the pupil back is a concave plane pulled backwards into this area
-the pupil front is dome that is only visible from the back/side on front so it looks spherical/still visible in profile
-highlights are simply little orbs placed on the dome!
@juneyboobear if we go by what he says and does during the beginning of the manga his personality shift was most likely due to his stand manifesting and him being worried it would hurt his loved ones, after he gains control idk maybe autism