Kodama was the boy chosen to pilot Zearth during the third battle with the robot, Cancer. He was a relatively quiet boy who liked to keep to himself. His father was a wary individual who ran a civilian contracting company. Kodama's two gifted older brothers hate their father and try to go towards a different path, however Kodama looked up to him and his status as a "chosen" man. He even wore Kokopelli's glasses to seem smarter like his father. Being raised by his father seems to have warped Kodama's sense of ethics and morality to the point where he enjoys to take shots at stray cats with a pellet gun.   ~!During his time as a pilot he made no attempt to avoid casualties and marveled at the death being caused because of him. This sense of wonder was cut short when he was sent crashing down on top of his beloved father's car killing his father instantly. For a moment he was left totally stunned but he managed to shake himself out of it in time to kill Cancer using knowledge gained by having an understanding of construction. He died unceremoniously a moment later. Kodama's death alerted the other pilots to their fate. His chair was a plush office chair. There were 50,000 casualties during his battle, many due to his own malice.!~  (Source: Wikipedia)

During a summer camp, 15 children, 8 males and 7 females, find a grotto by the sea. Deep within they discover working computers and some electronic equipment, and later the owner, a man called Kokopelli. Kokopelli claimed to be a programmer working on a brand new game, in which a large robot has to defend the Earth against alien invasions. He persuades the children to test the game and sign a contract. All but one of them signs, barely a moment later they mysteriously awaken on the shore believing what happened was just a dream. 
(Source: Anime News Network)

Hometown: São Paulo, Brazil

A Brazilian actor, voice actor and dubbing director, best known for voicing Max in Pokémon, Sota in InuYasha, Rock Lee in Naruto, and Dipper in Gravity Falls. He is the younger brother of Tatiane Keplmair, a voice actress. Thiago started dubbing at the age of five.

One summer, fifteen kids innocently wander into a nearby seaside cave. There they meet a strange man who invites them to play an exciting new video game. This game, he explains, pits a lone giant robot against a horde of alien invaders. To play the game all they have to do is sign a simple contract. The game stops being fun when the kids find out the true purpose of their pact.
 
(Source: Viz Media)
 
The extra story Bokurano: Mou Hitotsu no Bokurano (Yet Another Bokurano) ran after the completion of the main story.

An alternate retelling of the manga. 
It depicts most of the original characters from the anime/manga accompanied by a handful of entirely new ones, but with the same task of piloting Zearth to protect the world at the expense of their own lives. Most of the regular characters also suffered changes in their appearance and background.

Masaru Kodaka