I really like the name. I never watched the series or read the books, but somehow I know it's associated with this series. I think someone else posed a good point that sometimes the character's arc can take an undesirable turn (has the book series been finished?), and/or people may assume you used the name due to the series. It's not quite at the same level as, say, Elsa/Frozen, though. With the name being a constellation, it is much more than the book series. I like both pronunciations: LIE-rah or "LEE-rah."