Nova (Alita: Battle Angel)

Nova is a scientist in Zalem who works with the Iron City crime boss Vector to collect body parts to use in his experiments and the overarching antagonist of the movie Alita: Battle Angel.

History
Nova employed cyborgs such as Grewishka to attack people and steal their body parts to send to him so he could use them for his experiments.

After Grewishka was heavily injured in a fight against Alita and went to Chiren, Nova communicated with her and Vector through Grewishka's body to command them to fix the cyborg and send him to fight Alita once more.

When Alita attacked Vector's office to avenge Hugo, Zalem spoke to Alita through Vector.

Later, as Hugo was climbing on one of the tubes to Zalem in order to reach the sky city, Zalem activated one of Zalem's spiked defense rings to kill both him and Alita. Alita managed to dodge it but Hugo was struck by it and torn apart.

At the end of the movie, Nova is seen observing Alita from above as she is entering the Motorball ring to compete for the title of "Final Champion" so she can win and go to Zalem.