Add Kira and Ezri and I suspect someone at Paramount has a fetish for short haired girls. And tight suits.
No idea... cough (Berman) cough
There were lots of women with varied hair length and ages. Most vulcan women, Pulaski's can be considered short, the female Changeling, Ortegas, Seven...
I guess Yar must have picked up the drug habit in those hard days of her youth on Turkana IV.
What a bad influence! /s
Yeah, all that smoking filled her lungs with Tar.