Buffy Tattoo Suggestions?

I want to get a tattoo that represents Buffy the vampire slayer. But I don't want any words or like a face or anything. I want it to be more symbolic and obscure and not just like her name or something. Originally I was gonna do the circle of the black thorn from angel on my calf because they mention it in the show. But I realized it represented evil and I want a positive connotation behind it. So if any one has any suggestions please let me know.