No she is just being Asuka (remember she did the same with Shinji and Rei). The funny part is;they both are the same:they give nickname to others people (Mari called Shinji Puppy whereas Asuka called him Baka-Shinji)
SAY IT IN FRONT OF SOMEONE ELSE AND I'LL FUCKING BLAST YOU IN ORBIT!!!Mmmh...maybe if you call me by name~nyaaa...I can't help it, it's my catchphrase~Princess! Princess! Gotcha~nyaaa!Shut up, four-eyes!You're too close.Geez princess, are you going to call me by my name, someday~nyaaa?Four-eyes is enough for you.By the way, your "nyaaa nyaaa" is really annoying.And after all......you're the one who always go "nyaaa nyaaa" in bed, princess~They're always so noisy...