Lot of folks seem to think that she's not all that popular.
Prepare to be disappointed by humanity once more.
http://en.wikipedia.org/wiki/Lightning_%28Final_Fantasy%29#Reception
In 2010, she was ranked as the 34th most popular video game character in Japan in a Famitsu poll.
Out of all the Final Fantasy XIII cast, Lightning was voted as the most popular character in a Microsoft poll.
In a VideoGamer.com's listing of the best ten Final Fantasy characters, Lightning was sixth with the writer Yin Poole finding her interesting in the course of the game despite still finding her similar to Cloud.
In 2011, IGN ranked Lightning among the best Final Fantasy characters, saying that she demonstrated that "a delicate balance can exist between strength and tenderness, even in the midst of her incredible acrobatic feats."
In GameZone's list regarding the same subject, Lightning was eighth owing to her visual appearance as well as the character's determination which made her "one of the strongest female leaders of the Final Fantasy series."
Cheat Code Central also listed her as one of the top ten "badass" women of video games for her independence that distances her from previous Final Fantasy heroines.
Lightning also ranked second in AfterEllen's list of the "hottest" video game characters.
In Game Informer's list of top ten heroes of 2010, Lightning was ranked eighth and praised for her as the only protagonist in Final Fantasy XIII who seemed capable of taking on the corrupt government of Cocoon and that her no-nonsense approach to her mission made her the game's standout hero.
In 2013, Lightning was voted the favorite female Final Fantasy character in an official poll by Square Enix, and was also ranked twice in lists by Complex as the 19th greatest Final Fantasy character and the 39th greatest heroine in video game history.
Professional journalists and game developers have also ranked her high among important female video game characters, with her coming third in a list of top female characters in an RPG or JRPG during a panel at PAX Prime 2013.
According to several sites out there, she's considered a great character, super hot, and an important standout among female video game characters....despite, realistically speaking, being
absolutely none of those things.
Never underestimate humanity's capacity to drop the bar lower than you thought possible.