So Lightning has no emotions, but she gets emotional several times (inconsistency to the max). She shouldn't have any motivation since she feels nothing at all, but "NO ONE WILL STOP ME FROM GETTING SERAH! Even if it means I have to kill you". The game was supposed to make her "more human", but so far she's a cold fish (and quite frankly, she doesn't give a shit about her "humanity" as she says she's willing to throw it away to do what she has to do). She's not so much a character anymore as she is a force of nature who sometimes gets melodramatic.
How did we get from XIII Lightning to LR Lightning? I liked XIII Lightning, but LR Lightning is dreadfully boring and inconsistent.
This is why I don't understand WTF Toriyama and co. were doing... I mean really.