hmm...well, i've never actually thought about it, but now that i am, i guess i just see some similarities, but on different levels. she's said that hermione is based off of her, but that's referring to herself as a child. as adults, narcissa risked everything for draco; for that one chance that he would survive and have a better life. JK kind of did the same thing with her idea of Harry Potter. she took a chance at hopefully being able to offer her daughter a better life. it paid off for both women.