I think she is (actually she has to be) because A) Samurai X showed up only just after Zane lost connection with her B) She has the ability to mimic any voice, something a computer could probably do C) She never demonstrated any elemental power, and PIXAL doesn't have any D) She demonstrated excellent fighting skill which we know she had picked up from Zane in Rebooted E) She could have easily put herself in the computer like robots have done in the past It's PIXAL, thank you for your time
Ok what if
Samurai X was Pixal