Lita:
what other behaviors? wanting kangtae for herself? npd. depression? different thing ofc. low empathy? npd. disregard for other's feelings? npd
impulsivity is one of the criteria that distinguish between APD and NPD and she is really impulsive. unlawful behavior is another one, that she did too.
she does not seek attention... she does not mind it at all, but she is not seeking it from others. She does not try to be liked nor admired.
They hinted many times that she has problems with differentiating feelings other show and "reading" them. Not that she does not care to do that, but she cannot do that (like the way she studied the board of photos in episode 5).
There are studies showing that APD and NPD have far more in common that what differentiate it so some voices are heard saying they should be put under one diagnostic name. That said, going strictly by "the average APD and NPD" and diagnostic criteria, she does fit APD more than NPD.
Overall she fits APD better EXCEPT when she is with Kang Tae... her interactions with him are a mix of both APD and NPD and I might be leaning towards NPD with some scenes and APD with others.