Birthday: August 2, 2004 (Leo)
Age: 15      Height: 180 cm  Weight: 62 kg  Birthplace: Tokyo Metropolitan (Kanagawa prefecture)  Siblings: Younger sister (Saki Yajima)  Hobbies: Baseball    Another of Kouichi&#039;s childhood friend, Hideaki Yajima provided blunt force to protect Kouchi from his bullies since they were children, forming a solid bond with him. Much more level-headed than him though, he noticed the changes in his friend&#039;s attitude and tried to reason with him, to no avail, which prompted him to knock some sense in him. Such an instance, however, proved to be fatal for him, as while he and Kouichi were brawling, the sudden attack of the then-out of control Machina Apparition resulted in his mauling and death. While his fate in the manga is left unknown, in the anime he was saved from death when the same Machina that slaughtered him lost its Factor and chose him as its new one. He was then cured by the Katou Organization, which provided him with an artificial arm to replace his lost one. The anime also states that, while on the surface Kajima protected Kouichi, he did so only to gain Risako&#039;s attention, being deeply in love with her. These conflicting feelings led him to another harsh confrontation with Kouichi, after which the two friends reconciliated and stood side by side in the following events.        As a twist of fate, Yajima pilots the machine that almost killed him, the Machina Apparition. While of comparable size to Linebarrel, Apparition is much slender and thinner, lacking a huge outer casing. It is so far the only Machina capable of using optical camouflage, and is armed with a machine gun and an ultra-long range sniper rifle armed with high piercing bullets.

Fourteen-year-old Kouichi Hayase&rsquo;s life has always been a mediocre one, if not dismal. However, those days of being bullied by classmates and escaping to a fantasy of being a hero are put to an end when a certain &ldquo;accident&rdquo; bestows on him a girl and a gigantic humanoid robot called &ldquo;LINEBARREL&rdquo;. The extraordinary power that Kouichi obtains puts him and everything around him on a sudden rollercoaster ride of battles, intrigues and friendship! During the course of his adventure, the boy starts to learn what life has to offer; he meets new friends, bids farewell to the old ones, but most of all he now has considerable responsibilities and is forced to confront the world around him.<br><br>
(Source: Official site)

Episodes 25 and 26 included with the DVD.

The Linebarrels of Iron story takes place in a fictional alternate future, centering on a junior-high school student named Kouichi Hayase, who escaped his daily life of being bullied as a child by daydreaming about being a hero. His life was forever changed during a class trip in the year 2016 when an artificial satellite fell from orbit. Due to this "accident", Kouichi was left in a coma for half a year, and upon awakening, found himself with strange powers, including superhuman strength.<br><br>
(Source: Wikipedia)