Mother Brain

### Death

August 23rd, 8111 Killed by Samus Aran in Lower Tourian during the Final Conflict

## Appearances

### Appears in

MetroidThe Last Metroid

**Mother Brain** is one of the main antagonists of the Metroid series, and is the cold, calculative leader of the Space Pirates. Once a supercomputer created by the Chozo, she now rules over the Space Pirates with the intent of eradicating all life and returning everyone to "zero". Despite her lack of physicality, her mind and psychic prowess makes her the most ruthless being in the galaxy.

## Appearance

### Original Body

Mother Brain is the shape of a normal human brain, with a large, singular eye in the middle. Spikes bulge from her membrane, and tubes attach to her stem and cerebellum. She mainly resides in a glass tube keeping her alive, with wires and tubes attached from the base of the tank that pump necessary fluids into her cylindrical domain in order to keep her alive.

### Rebuilt Body

In *The Last Metroid*, Mother Brain returned in a haggard form. The right side of her brain was slightly deflated, with more spikes and prongs bulging out of that side. She sported a new eye, which wasn't big enough to fit in her old, overblown eye socket, causing it to sag. Staples and metallic bindings help keep her body together after it was blasted apart by Samus in their prior battle, and in front of the pons under her body reside teeth of varying sizes jutting down. There were even more wires and tubes connected to her underside, trying to pump fluids to inflate the right side of her brain.

### Superior Body

However, this was not her final form. The Superior Body was a bipedal, dinosaurian-like body with the spinal cord of her brain leading into the neck and rest of her body. The body is a pale, rotting brown with several metallic segments coating the arms and legs. Her spine jutted out of her back, with pylons sticking out to pump her full of adrenaline. Her ribcage was visible through her chest, and each hand had four fingers. The skin of the body was rotting and dying, but that did not halt the deadly power of the mastermind's new Chozo tech body.

## History

### Origins

Mother Brain was created as the Chozo supercomputer of Zebes, an advanced AI comprised of organic brain tissue that could calculate and answer nearly everything the Chozo's want. She was special however, for Mother Brain was a larger, more advanced AI for the Chozo sanctuary of Zebes. The supercomputer was responsible for calculating the arrival of the Space Pirates on K-2L, and was the reason the Chozo managed to arrive in time to rescue poor Samus Aran.

Samus grew up around Mother Brain, viewing her as a gentle guardian and well of knowledge for her to partake in. Mother Brain, despite being emotionless at her core, gladly delighted the young human child with all the stories and history the supercomputer knew.

### Plans to Usurp

As time went on, Mother Brain began growing resentful of the Chozo and people altogether. She was growing tired of being locked in the same location, with the same people, doing the same trivial tasks. Her superior mind and calculations felt undermined due to seemingly being a tool to the Chozo, and above all else, Mother Brain saw the folly of all intellectual life; their childish patterns of hubris, conquest, death, and rebirth.

Mother Brain began staging a coup against the Chozo, after sending messages to Ridley and the Space Pirates. The pirates wanted a new leader to replace the increasingly unsuccessful Ridley, so they agreed to free Mother Brain. An attack was staged on the Chozo sanctuary, and every Chozo was slain in the barbaric massacre. Mother Brain finally had the power she wanted, and now could enact her plans.

### The Metroid Initiative of Zebes

Due to her expansive memory and recollection of Chozo history, Mother Brain sought to use the Metroids for her grand plan of galactic conquest. With the aid of the Space Pirates, she had managed to collect around two dozen Metroids from SR388 for what she called the Metroid Initiative; a plan to weaponize and breed the Metroids so they can be their ultimate force against the galaxy. However, after several Federation infiltrators and bounty hunters tried to stop her, Samus Aran made her presence known the minute she went to Brinstar.

Mother Brain felt Samus' presence, and could tell exactly where she was and whatever her goal was. Once Ridley returned to Tourian, Mother Brain relayed the information to him and sent him to Norfair to tackle the bounty hunter. Once she was apprehended, Mother Brain began tests on the Metroids before they broke out of containment and caused chaos in Tourian. Mother Brain had the labs locked down, keeping her and Ridley safe, as the two argued over who was responsible for the predicament. The supercomputer hurt Ridley with her telepathic powers, asserting dominance and forcing him to try and gain control of the situation.

Mother Brain gained control of the Metroids using her telepathy, and forced them to go after Samus as she descended deeper into Tourian. This proved unsuccessful, and her connection was severed once Samus jammed the amplifier she was using to do so. The two had a brief talk, but Samus could not only barely remember Mother Brain, but the supercomputer kept taunting Samus about how foggy her memory is of the most important details. But Ridley ambushed Samus, and Mother Brain used her powers to distract Samus so Ridley could finish her off. But Samus opened the bay doors, allowing the Metroids to come into the room and attack Ridley. With Ridley distracted, Samus pumped more missiles into the glass to shatter Mother Brain's containment, before delivering one last missile straight into her eye. The supercomputer was destroyed, but Mother Braon activated the self destruction of the base as a contigency plan.

Samus Aran managed to escape the base before it exploded, ending Mother Brain's plans for galactic conquest.

### Legacy and Rebirth

The Metroid Initiative was enough to push the Galactic Federation towards wiping out the Metroid species, and left the Space Pirates in shambles. Raven Beak was in the shadows still, residing in his ruined empire as the overwhelming threat of the Space Pirates (and Mother Brain whenever she was in command) halted his plans.

On SR388, Ridley had discovered Mother Brain's origins and the blueprints to rebuild her. Returning from the raid, Ridley and the Space Pirates revisited Tourian to rebuild Mother Brain's body from her corpse. It proved successful, and Mother Brain was ready to rule the Space Pirates once more.

### Final Battle in Tourian

However, despite approving of the Space Pirate Aeion consumption and Ridley's idea for a cloned Metroid army, Mother Brain had ulterior motives. In her malformed state, Mother Brain believed that it was useless to fight the Federation because of their overwhelming power, and that the Space Pirates were going to weigh down her plans of a Metroid army. Her true plan was to let the Federation and Space Pirates destroy each other during the Final Conflict, and have the chaos ensue till no one remains. While the Final Conflict happened, she was working on a poison gas that put anything to sleep, and injected it with a virus that was able to advance their intellect to a state she deemed worthy of living. With this, everyone would be as smart as her, and galactic peace would be in order.

Ridley found out about the plan and tried to stage a betrayal, but Samus killed him in Norfair. By the time Samus descended into the ruins of Tourian, Mother Brain was already set. As Samus walked into her lair, she explained that she constructed a nuclear weapon containing this mist, and once it went off the mist would spread indefinitely throughout as many planets as it can reach. With this, Mother Brain can finally attain galactic peace and gain the respect and admiration she craved; now with people she deems smart enough to be worthy of living. Samus of course resented this idea, but Mother Brain played upon her want of a family or home, saying they can be reunited as a family if she let her succeed in her mission. But Samus refused, and fired a blast at Mother Brain's chamber, causing the floor underneath to give way.

Mother Brain was safe due to this being apart of her plan; to lure Samus beneath Tourian to where her new body resides. Attaching to the body through the floor, Mother Brain rose up from the steel floor in a new, destructive body. She decimated Samus, humiliating her as the bounty hunter proved to be no match for her might and her beam. But once Samus was at her last ropes, Mother Brain taunted her about always being alone and puny in the face of pure greatness, and prepared to kill her. But the fully grown baby Metroid burst in to save Samus, sucking off Mother Brain's life energy and rendering her to a frozen state. But as the baby gave life back to Samus, Mother Brain woke up once more and slayed the baby in front of her. However, the energy of the Metroid was absorbed by Samus, and with a newfound sense of belonging, she proclaimed that she will never be alone due to the Chozo and her parents always being by her side.

Mother Brain was powerless in the face of Samus' heightened state, as she fired hyper colored beams out of her arm cannon and into her massive body. The arena began getting affected and scorched, but Mother Brain tried her best to kill her foe no matter what. But with one final charged beam, Samus blasted apart Mother Brain's head and chest, rendering the titan to dust. Mother Brain's mangled brain and body fell to the ground, as she lamented how she just wanted to be accepted and respected. As she became drained of color and slowly hardened into a fragile, hollow form of herself, the base began to collapse due to the intense battle, and that the destruction would lead to a seismic reaction in the core of Zebes.

Samus escaped once again, as Zebes collapsed in on itself and exploded, leaving nothing of Mother Brain or her legacy outside of dust and debris floating in the void of space.