During the 10th ZOTT, Alita is entrusted the relic "Fata Morgana" by Caerula Sanguis, which grants her direct access to the quantum supercomputer Melchizedek and makes her the Last Order agent.

In the epilogue of the original series, years after sacrificing herself to save Zalem from crashing down to Iron City, Alita was regenerated as a fully flesh-and-blood woman with long black hair and appeared to be taller than her typical height.

In the original manga, "Alita" was actually the name of her adopted father Daisuke Ido's black pet tomcat, who died a month before he found the remains of cyborg girl in the huge junkyard.

After gaining the Berserker Body, she switched to attire more appropriate for a hunter-warrior (bounty-hunter) that featured black sleeveless leather catsuit with fingerless gloves combined with brown knee-high boots and a light yellow trench coat.

Originally codenamed HK-BR035, Yoko was "born" in Cydonia in ES 370 during the crumbling Archduchy Era that was plagued with civil wars, as a maske tumor extracted from a woman named Nollin Sonann and grafted into a mechanical body, and is the only known successful case of such experiments that produced a healthy, viable subject.

When the villain Baron Muster (Nollin's vengeful brother) learned of her existence, he took her away and named her Yoko, and used her in a conspiracy plotted with Marquis Maruki Baumburg to overthrow Cydonia's ruling queen Kagura Dornburg.

As Yoko was unable to walk because she was too young to properly control her mechanical body, a sympathetic one-eyed girl named Erica Wald volunteered to accompany her.

Yoko spent the next year living a happy comfortable life at the Baumburg Mansion under the watch of Kyoko, who actually developed a genuine maternal bond with her.

In ES 386 during the height of the interplanetary Terraforming War, the 16-year-old Yoko was picked to carry out Operation Maulwurf against the Venusian-Earth alliance, and managed to infiltrate Ketheres and upload a virus into the supercomputer Melchizedek.

This disrupted the navigational systems of the five Leviathan-class colony ships, destroying four and killing 450,000 civilians, as well as causing a complete Gestalt breakdown in Melchizedek's organizational processes, from which it never fully recovered.

After this event (known as the Camranh Tragedy), Yoko was captured by Caerula Sanguis and tried as a class-A war criminal, and was sentenced to death by immolation via atmospheric drop as punishment.

Due to special protocol built into her cyborg body, Yoko's brain survived atmospheric entry, but crash-landed near Star City where she lay in suspended animation for almost 200 years.

When protecting the injured Ido, her fighting caused an instinctive recollection of the lost Martian battle technique "Panzer Kunst", which allowed her to quickly deliver a single killing blow to the murderer.

Feeling he has no other choice, Ido reconnected Alita to a Berserker Body, which allowed her to kill an upgraded Makaku in a long fight in the sewers beneath the Scrapyard.

Alita's final and greatest match was against Jashugan, the Top League champion whose mastery of chi' enabled him to surpass the limits of his body despite having been mortally wounded.

Later on, Desty Nova attached Zapan's brain to the Berserker Body, creating a rampaging monster that killed Ido and destroyed Bar New Kansas.

Promising to resurrect Ido, Nova provided Alita with a Smith & Wesson Model 610 revolver and a capsule containing collapser, an agent designed to destroy Berserker cells.

Bigott offered to give Alita a purpose in life working as an agent of Tiphares, but she refused until he mentioned that her primary mission would be to hunt down Desty Nova.

Cultivating a friendship with her new operator, Lou Collins, Alita also fell in love with a mercenary named Figure Four, who helped break her out of her fatalistic mindset while she accompanied him to his hometown of Alhambra.

With Bigott and several of the other adults going insane and committing suicide from this revelation, Nova trapped Alita inside a virtual reality called the Ouroboros Program and attempted to break her fighting spirit.

To save Tiphares from falling and colliding with Scrapyard below, Alita takes an Imaginos trigger given by Nova and sacrificed herself to secure the Sky Hook by fusing with it.

Five years later, Kiyomi and Figure encounters a senile, insane Nova, who lures them in to a cavern deep in Ketheres, where they find Alita reborn from the Tree of Life with a human body.

A pre-recorded video message then reveals that Nova exposed the brain bio-chip conspiracy to the Tipharean population, resulting in mass insanity quickly spreading and devastating the floating metropolis, culminating in a chaotic two-week civil war.

Going into space with new and old companions alike, to look for her lost friend Lou Collins and to find out more about her forgotten past, Alita is caught up in an interplanetary struggle between the major powers of the colonized solar system.

At the Mariama memorial site, she re-encounters her childhood friend and fellow Künstler Erica, who became an undead Necro-Soldier – the infamous assassin known as "Frau X" – and is immediately drawn into a Martian power struggle.

In the 1993 OVA Battle Angel, Gally (known as Alita in the Manga Entertainment UK and European releases) is immediately given a variant of the Berserker Body after being discovered by Ido.