Narcissa Malfoy was not a nice character. If you want to use a HP character name, you ought to at least make sure its not a villain, or if it is that there are plenty of other non-villainous associations to it. Yes, there is a narcissus flower, but it's named after Narcissus, who was so in love with himself he gave his name to the name of a personality disorder that everyone on the Internet is diagnosing in people they don't happen to be happy with.
I'm never sure how to pronounce Lyra. Lie-ra? Like liar? Or Lee-ra, like leer?
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin