Cobalt

Also known as コバルト (Kobaruto)

Hello, My Name (in English) is…

As a member of Astro Boy‘s family, like his little sister Uran, Cobolt’s name is reflective of the atomic age – in this case the radioactive isotope Cobolt-60, which was famously used at Columbia University in the 1950s to establish parity violation in radioactive beta decay.

Distinguishing Features

Astro Boy‘s older brother shares a strong family resemblance with his more famous sibling. However, while he also has the famous “double triangle” hair style, his face is longer and more oval-shaped than Astro’s. That makes them easy to tell apart.

Minor Star (★)

An inferior copy, created by Dr. Ochanomizu as a temporary replacement for Astro Boy, Cobalt has abilities comparable to those of his brother. However he lacks Astro‘s intelligence and common sense and is often clumsy, gullible, and accident-prone as a result. Although he often causes problems for the entire family, he remains extremely kind-hearted and loyal – characteristics which help Astro out of trouble from time to time.

Notable Roles

Primarily a member of the supporting cast in Astro Boy (1952-68), Cobalt has also made an appearance in the Black Jack (1973-83) chapter “Leaf Buds” as one of the boys in the class.

Manga Appearances

If you spot an appearance not already listed, please let us know in the comments section below!

1954

Astro Boy (“Cobalt”) as “Cobalt”

1955

Astro Boy (“Youth Gas”) as “Cobalt”

1956

Astro Boy (“The Midoro Swamp”) as “Cobalt”

1960

Astro Boy (“Uran”) as “Cobalt”
Astro Boy (“His Highness Deadcross”) as “Cobalt”

1961

Astro Boy (“The White-Hot Being”) as “Cobalt”
Astro Boy (“The Third Magician”) as “Cobalt”

1962

Astro Boy (“Robot Land”) as “Cobalt”

1963

Astro Boy (“Demon Bees”) as “Cobalt”
Astro Boy (“The Devil’s Balloons”) as “Cobalt”

1964

Astro Boy (“The Greatest Robot on Earth”) as “Cobalt”

1965

Astro Boy (“Roboids”) as “Cobalt”
Astro Boy (“Blue Knight”) as “Cobalt”
Astro Boy (“Broadcasts from Outer Space”) as “Cobalt”

1966

Astro Boy (“Astro Boy Reborn”) as “Cobalt”
Astro Boy (“Meeva”) as “Cobalt”

1967

Astro Boy (“Beginning of the Contradiction”) as “Cobalt”

1968

Astro Boy (“The Man Who Returned from Mars”) as “Cobalt”

1974

Black Jack (“Leaf Buds”) as “a classmate”