What is considered human brain with robot parts?
That would mean in essence – particularly if you look to the manga for answers – that Alita was once all human.
However, what about now? There’s a clear difference between Love Interrupt Hugo (Keean Johnson) who is flesh and blood at the beginning of Alita: Battle Angel and Alita herself. In the film, Alita even asks about her humanity, saying: Is it bothersome that I am not completely human? Hugo replies to this saying : “You are the most human person I have ever met” What is a human brain with robot parts considered as human? He sure believes this, though the truth comes down to personal beliefs. Alita still has the same human brain with which she was presumably born and Hugo considers her not only human but a human.