The Puma Sisters

From Dominion Tank Police anime/manga, Annapuma and Unipuma are twin feline android criminals (try saying that five times fast). They originally worked with Buaku but eventually parted ways and struck out on their own.

Once exotic dancers and strip teasers, they still have the skill and can use it to dazzle the cops before laying down heavy bursts of gunfire upon the stupified "audience". This is not to say that they're both completely heartless, but try telling that to the Tank Police. The twins in fact seem to have changes of heart when they eventually give vital tips that will prevent Leona from a fate potentially worse than death.