Master recently asked me if I considered my kinky "personas" as separate characters, and/or if I pretend to be specific fictional characters when I'm sceneing. I had to think about it for a bit because it's not really something I consciously consider when I slip into my Dom or sub roles. But I realized I do at least have characters that are "points of inspiration" for me, though I don't necessarily pretend to be them, specifically.
When I imagine my "Domme self," I imagine a woman who looks like her (though not necessarily as blonde as her, as my hair is nothing like that). I like to imagine myself in slinky dresses and elegant jewelry (things which are sadly underrepresented in my actual wardrobe), and with high heels that I can somehow walk in effortlessly. The femme fatale, if you will. It's funny because I'm normally nowhere near that femme in my everyday appearance, nor do I particularly want to be. But my conception of domming is inextricably linked with high femme, for whatever reason.
I'm not sure if I imagine my kitten persona as looking similar to Merle, besides the catlike features; my mental self-image is much murkier in that regard, for some reason. I do imagine myself as being considerably shorter and smaller than everyone else, like Merle is. I'm not sure how old Merle is supposed to be, as there are "adult" catpeople who are bigger and more grown-up-looking in the show, but age difference doesn't really factor in as part of my persona (the childishness implied in "kitten" notwithstanding).