He's the first human to be born and raised in Ismo. While living in the village, he was the star trouble maker of the group. He was respected amongst his peers as the leader and bring no end to mischief (for good or bad intentions). After he encounters Susanoo and used the destructive powers of the mech to defeat their enemies attacking the village, the villagers banished the mech and blame it for their misfortune. Yamato can't deal with the superstitious nature of the villagers and opted to leave with his best friend to see the world. It was his journey not long that would allow him to meet Oto and new friends and enemies. After defeating Orochi, he leaves Susanoo where he once rested in the caves and visits him to talk. Because there's no epilougue, it's assumed that Yamato will still cause some trouble in the village as he used to. He'll also probably end up with Oto and start a life together in the village.  In After War, Yamato is called again to pilot Susanoo when a piece of the Dark Sky Carriage falls near the village and Shuranoo reveals itself. But when Yamato refuses to fight Shuranoo, who is possessed by Mikazuchi, Shuranoo mercilessly slashes at Susanoo and then sends it into the lake where it is rescued and healed by the Dragon Carrier. The renewed Susanoo flies off to find Oto who had been kidnapped by Shuranoo. In the end, Yamato was going to sacrifice himself and Oto (willingly) to defeat Tsukiyomi by flying into the sun. Before they get to the melting point, Mikazuchi appears and tells them that he would pilot Susanoo and that Yamato and Oto should live out their lives. Tears fall from Yamato's eyes as Susanoo looks back at him once more before flying into the sun destroying himself and Tsukiyomi.  Source: Wikipedia

In the 25th century, a spaceship carrying 300 people leaves the earth in search of a new world in the solar system, but an unexpected accident occurs. They crash into a black hole which is connected to another universe. The people on the ship are cast adrift in an emergency capsule to a planet called Ismo. The story begins 12 years after they have reached Ismo. 
Ismo is a star of the Onam System, which corresponds to the Solar System in our universe. It is the only planet left in the Onam System. The Death Star called Yomi is a comet which regularly approaches the Onam System. 
There were once 8 planets in the Onam System. Many years ago, in the time of the gods, there was a war against the evil monster Yamatano Orochi (an 8-headed snake-like creature). The gods won the battle. Yamatano Orochi was locked into 8 stones, one of which is buried deep in the center of each planet. Nobody was supposed to have access to the core of the planets. However Tsukuyomi, an evil god who rules Yomi, succeeded in reaching the stones one after another, destroying 7 of the planets using his powerful robots, the Sky Warriors. However, when he tried to acquire the last stone from the planet Ismo, the most powerful Sky Warrior, Susanoo, got out of control and was blown away. 
A million years later, the Death Star Yomi is approaching the Onam System once again. Tsukuyomi, the master of Yomi, plans to take this opportunity to realize his dream of ruling the entire universe. He is desperate for the last stone containing Yamatano Orochi. If Tsukuyomi can get hold of this stone, Yamatano Orochi will return to life and its power will become his. Tsukuyomi needs Sky Warrior Susanoo to capture the stone, and sends 8 Sky Soldiers to get Susanoo back. But it is too late. Susanoo no longer belongs to Tsukuyomi. It belongs to Takeru, a 13-year-old boy from Earth, who happened to discover the buried robot Susanoo and woke it from its million-year-long sleep. Takeru becomes involved in the battle against the Sky Soldiers and their evil master, Tsukuyomi. Susanoo stands up to protect his friends and their planet. 
(Source: AnimeNfo)

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Non-anime roles: ~!
Alan Parrish (young) in "Jumanji" (live action movie) (Japanese)  
Chizuru Nanase in "Refrain Love 2" (VG) (Japanese)  
Chizuru Nanase in "Refrain Love" (VG) (Japanese)  
Guido in "Grandia" (VG) (Japanese)   
Pugsley Addams in "The Addams Family Values" (live-action movie) (Japanese)  
Pugsley Addams in "The Addams Family" (live-action movie) (Japanese)
!~

Three years have passed after the decisive battle at the end of Yamato Takeru and peace has return to the land. Takeru, Oto and their friends return to the village and continue living their days in bliss until one night Shuranoo, piloted by Mikazuchi, marks a return and appears in the village to wreak havoc. Takeru is left without any choice and is forced to reactivate the sealed Susanoo from his slumber. However, this is just the beginning of a new threat, and Takeru has to overcome himself if he wants to rescue Oto from the impending danger. 
(Source: AniDB)

Takeru Yamato