I've met this author Robin Lovejoy, a striking redhead, kind of a real-life Princess Merida in shades and with an English accent. This is reflected in Robin's book BANSHEE IN THE WELL which features a sassy, karate-chopping banshee girl called Sathra. But Sathra is no angel, she has murder in mind. I guess you could say Sathra is Princess Merida's evil twin. But Banshee in the Well is an awesome read in its own right and I really hope there'll be a sequel.