What's the difference here, is it that the up parts are significantly shorter than the down parts? Does Segawa Izumi count?
i'm not really sure how to describe this, but when i try to look into haqua's hair, the thinner parts, are almost perpendicular to the side of the head. these split(?) hair might be as long as a regular ahoge and yes, a lot shorter and fewer than the majority of the character's hair.
how i would differentiate this from two_side_up is the latter's bunched up or grouped portions are significantly greater and easily recognizable, which is exactly the opposite of the former.
surprisingly, many of tsukamoto_tenma are currently tagged as short_twintails, which i believe personally is a mistagging practice. short_twintails implicates twintails but twintails require "ALL of the hair must be tied into two pigtails for this tag to count". haqua and tenma's hair are not twintails based on its very definition.
segawa_izumi's split(?) hair is significantly fuller than the mentioned characters earlier. it's currently tagged either as two_side_up or twintails. i personally wouldn't mind reclassifying post #602445 with a new tag but not post #438596 .