There are a lot of relatively young and highly talented female rock/metal bassists coming out of Japan right now.
Tomomi (of course) from Scandal
Misa from Band-Maid
Koga from Gacharic Spin/Doll$Box
??? from Girls Rock Band Revolution (can't find her name)
Akari from Chu's Day
Be from Mutant Monster
Nohana from Stereopony/Draft King
I'm sure there are others, of course.
So, are there any female bassists out there that you really admire?