Blue Knight

The Blue Knight appeared in the 1960's and 2003 series. He did not appear at all in the 1980's series, his role being replaced by Atlas.

1960 TV series
The Blue Knight appears in episodes "Blue Horseman" Part 1+2 (episode number:179 and 180)

Volume of the Blue Knight film
The Blue Knight never appeared in the 1980's TV series. However the Blue Knight did appear in a short film called Volume of the Blue Knight. In the film the 1980's version of Atlas is also shown in a flashback.

He is never called by the name "Blue Knight", being called "Blue Bon" instead throughout the whole film. Blue Bon fights the humans out of hatred for breaking apart his family.

2003 TV series
The Blue Knight is an ally of Astro Boy that hates humans because of the way he was treated by humans when he was small and vowed for revenge. Found by Shadow, he was changed into a battle bot. He has a sword as his weapon.

Personality
The blue knight can often be careless, and never thinks before acting. It took Astro a long time for him to realise humans are not all bad.

Interactions with other characters
Astro

Grudon, his original cruel human master

Shadow, who found him and rebuilt him

Robotonia
Main article: Robotonia

Robotonia is a robot city situated at the south pole that the Blue Knight built for robots. It declared war on humans shortly after.