The following three images are tagged "twintails".
post #2747594
post #2747765
post #3025846
So are these three:
post #2200531
post #554405
post #1200401
Should the first three have the "messy_hair" tag, and the last three "straight_hair"? I've been trying to differentiate between the two styles, but it seems these two tags are under-used.