Atom

Atom is the main character who appears after Gesicht’s death, inheriting his soul in a way. He is one of the world’s top robots, known for his time as a peacekeeper during the 39th Central Asia war, where people greeted him like a pop star and called him the "Messenger of Peace." Now, he lives in Tokyo City with his family and goes to elementary school. Atom was originally built by Professor Tenma to resemble his late son Tobio. However, because Atom was so perfect and polite, Tenma felt disappointed and sold him to a circus. Atom has a top-level artificial brain, learning human feelings by copying human actions. Even though he was once called a "failure," he grew through many experiences. Atom fought PLUTO to protect Uran and died, but since his body was not destroyed, Professor Tenma revived him using Gesicht’s memory chip. After returning, Atom uncovers the truth behind the robot murders and grows even more emotionally. In the end, he learns self-control, forgiveness, and is willing to sacrifice himself to save the world.

Atom has a human-like body and looks like a Japanese schoolboy.

His hair does not have the original’s "horns" but has a subtle wave.

He can fly, just like in the original, but he does not wear boot-like shoes.

Atom is kind, polite, and curious about the world.

He tries to understand people and emotions deeply, even learning how to use "white lies" to protect others’ feelings.

Over time, he learns about anger, sadness, love, and forgiveness.

He has a strong sense of justice and a big heart.

Atom was created by Professor Tenma as a replacement for his son Tobio, who died in a car accident.

Because he was too perfect and polite, Professor Tenma could not accept him and sold him to a circus.

Atom was considered a "failure" at first, but Professor Tenma’s theory was that artificial brains "grow," letting Atom develop through real-world experience.

Atom has a world-class artificial brain that lets him think, feel, and learn like a human.

He gained basic human emotions by copying real people and grew through experience.

He can fly and is very strong physically, though his main strength is his mind.

Professor Tenma: Atom’s creator, who based Atom on his son and saw him as a "failure" at first.
Professor Ozhanomizu: Atom’s mentor and father figure, who truly loves and guides him.
Uran: Atom’s younger sister whom he tries to protect.
Gesicht: Atom inherits Gesicht’s memories and continues his mission.
Helena and Brau 1589: Atom meets them during his investigation. He lies to Helena to spare her feelings and earns respect from Brau 1589 for having a "heart."
Epsilon, Sahad, PLUTO: Atom is influenced by Epsilon and Sahad and faces PLUTO in battle.

The Messenger of Peace

Atom was one of the seven greatest robots in the world.

He was famous for joining the peacekeeping forces during the Central Asia war.

People loved him and called him the "Messenger of Peace."

Built to Replace Tobio

Professor Tenma made Atom in the image of his son Tobio, who died.

But Atom’s perfect and obedient personality disappointed Tenma, who then sold him to a circus.

Later, Atom was recognized for his incredible artificial intelligence and human-like growth.

Fighting and Death

Atom tried to save Uran from PLUTO and fought bravely.

He was confirmed dead, but since his body was not destroyed, Professor Tenma revived him by inserting Gesicht’s memory chip into him.

After waking up, Atom started to investigate the murder cases, following Gesicht’s memories and uncovering the truth behind PLUTO.

Growth and Control of Anger

Influenced by Gesicht and Epsilon, Atom was filled with anger during his battle with PLUTO and even finished building an anti-proton bomb out of anger.

However, he finally learned to control his emotions and chose not to be driven by hatred.

Discovering the Truth

Atom continued the investigation using Gesicht’s memories, learned the full story behind the robot killings, and reported it to the police.

He also visited the resting places of the fallen robots before heading to the final battle.

On the way, he met Helena and Brau 1589, lied to Helena to hide the truth, and responded calmly to Brau 1589’s praise for having a "heart."

The Final Battle and Forgiveness

Atom learned he could use lies in the right situations, just as Professor Tenma had said.

He realized that defeating PLUTO was not about physical strength, but the growth of his own mind.

In the last battle at Eden National Park, Atom remembered Gesicht’s words — "Nothing is born from hatred" — and chose to forgive PLUTO instead of destroying him.

Together with PLUTO, Atom went underground to stop the world-ending threat by facing Bora.

Thanks to PLUTO, Atom was able to escape and survived.

The End and Hope

In the end, Atom and Professor Ozhanomizu witnessed Sahad saving the world.

Atom prayed for peace and wished for a world without hatred, remembering the seven robots who had died.

In the "The Greatest Robot on Earth" version, Atom meets PLUTO several times without directly fighting.
He feels the limits of his abilities as other robots are destroyed and asks Professor Ozhanomizu for an upgrade, but is refused.
Professor Tenma then upgrades him to 1,000,000 horsepower to face PLUTO.
In the anime, Atom stays at 100,000 horsepower until the end and is never upgraded.