Astro Boy, known in Japan as Atom (Japanese: アトム, Hepburn: Atomu), is a fictional character and the main protagonist of the eponymous franchise.

"[3] As Tezuka's art style advanced, Astro "became more modern and 'cute'" to appeal to the audience of boys in elementary school.

At the circus, Tobio was renamed to "Astro" and later found by Professor Ochanomizu (Dr. Elefun) and taken away following the law of robot rights.

Professor Ochanomizu gave Astro a family with a robotic mother, father, sister (Uran/Astro Girl) and brother (Cobalt/Jetto).

As head of the Ministry of Science, Professor Ochanomizu often calls on Astro to help resolve situations involving humans, robots and (on occasion) extraterrestrials.

His destroyed clothes appear to be the only consequences, but not very long afterward the robot has a malfunction and his eyes flashing red.

On the cruise ship, The robot Tobio fails to master his powers, and has caused a lot of damages such as breaking a tap and ripping away his father’s suit.

As a result, Tenma forbids him to go to the dinner with him, but changes his mind at the request of a passenger who want to meet his son.

A cruel, unforgiving ringmaster for a robot circus, he wants to use Tobio for basic backstage work and asks Astro to sign a contract.

About to destroy him, Atlas forgives him remembering of Livian's words who told him to not take advantage of weak people.

Confident in Tobio’s abilities, Kathy convinces Hamegg that she can teach him Tornado’s dangerous act, which involves him jumping through two spinning rings filled with electricity, which would save the circus.

Tobio trains while the circus moves to another city, leaving Ochanomizu, who has finally recognized him as Dr. Tenma’s missing robot.

Astro Boy re-appears as the protagonist in the 2003 series; a robot with the ability to think and reason ('Kokoro', or Japanese for 'heart and soul').

Tenma, however, during the project lost the trust of his fellow scientists, who had thought that he has been overcome with grief and longing for his son and as a result went insane.

The robot, though, was found by Tenma successor (Ochanomizu, called Dr. O'Shay[5] in the English dub) who attempted to bring it back to life and succeeded.

Ochanomizu then made him as human-like as possible through means of allowing him to go to school, interact with friends and even gave him a robotic sister (Uran, called Zoran[6] in the English dub), which he is very protective of.

The film is set in the futuristic Metro City, a metropolis which floats in the sky above the polluted "Surface".

Metro City's population is aided by a multitude of different robots who are dumped on the Surface when broken or disused.

Toby, son of Dr. Tenma, learns that his father is going to show President Stone, the militaristic leader of the city, the Peacekeeper, a new guardian robot that he's been working on.

Meanwhile, Toby has been released early from school and rewires Orrin, his family's robot, in order to attend the Ministry of Science's demonstration of the Peacekeeper.

He discovers various other abilities and heads home to tell his father, only to find that Tenma and Elefun are discussing deactivating him.

President Stone's men detect the Blue Core's energy signature and pursue Toby.

He meets several children including Cora, a girl who left Metro City after her parents neglected her, and a robotic dog named Trashcan.

Astro secretly revives ZOG, and the kids bring him back and clean him up for the Hamegg games.

Astro is able to slow Metro City's descent by flying underneath and pushing upwards with his leg-rockets.

Astro has machine guns on his backside like in the 1980s series, however this time they fire actual bullets, instead of lasers.

[7] IGN's Chris Mackenzie also ranked Astro Boy as 2 on the list of the top anime characters of all time.

[10] Katsuhiro Otomo chose ATOM as the name of the main computer in his manga Fireball as an homage to Tezuka and the character.