In my WIP, I've currently got two different femme fatale type characters (and a planned third) which all fill similar roles in separate subplots. However I don't want to have three identical characters, so I was wondering how I might go about distinguishing them. The obvious thing is to give them different personality traits I realise, but it's harder than it seems because femme fatales have specific traits. You can hardly have a shy, prudish seductress. Any suggestions?