The following is a list of fictional characters from the anime show Gad Guard and their describtion. The characters were designed by Masahiro Aizawa based onYoshitsune Izuna's original designs.
Main characters
Hajiki Sanada
Age: 16
Hajiki is the main protagonist of Gad Guard and is a short-tempered and somewhat jaded boy. Being the eldest child and only son of the Sanada family, Hajiki works as a delivery boy in Unit Blue for Mr. Hachisuka of the Hachisuka Express. A bit of a degenerate and a punk initially, Hajiki skips school, races the cops on his skateboard or moped, and hangs out at all hours with his similarly punkish friends for lack of anything better to do. His mother was widowed when his father, an astronaut, died in a freak accident concerning the launching of a ship into outer space. Now the man of the house, Hajiki, works himself to the bone, losing sleep and even putting himself in danger to help his mother and his sister Satsuki survive.
The main events in the series center on Hajiki's rivalry with Katana and the relationships he shares with the other Techode owners. After running into the justice-crazed Takumi, the friendly Aiko and the danger-prone Arashi, the group forms a friendship over the course of the series. Their relationships vary from episode to episode, as Hajiki sees Takumi as overly righteous, thinks Aiko's a little too obsessed with mutual friendship, and can’t seem to understand what to do with Arashi. Still, he seems to hold all four of the others close, even Katana, and like Aiko, he wishes they were all on the same side.
'Hajiki' is Japanese slang for 'gun', an object that is by nature quick, forceful and erratic. A gun is also commonly considered the weapon opposite of a sword, which is by definition a sharp, precise and brutally personal weapon, qualities relatable to Katana.
Lightning
Lightning, named after his father's plane, is Hajiki's Techode that he receives in the first episode after coming into contact with a Gad he was delivering. Lightning is very quick and especially made for melee fighting and jumping through the use of the extendable exhaust tubes coming out of its neck. It also has engines in its lower legs, which can propel to great speeds when it gets down on one knee. Lightning is mostly red, white, and blue and resembles a sort of superhero.
Katana
Age: 18
Katana (pronounced kah-ta-nah, as opposed to ka-tah-nah, like the sword) is the main anti-hero of the series who acts as antagonist to the main characters, though he constantly switches between villain and ally from situation to situation, depending on his ever-shifting mood. Appearing as a gothic mutation of a schoolboy in a striped shirt, sweater vest, tie and slacks, all under a trench coat, Katana is tall and narrow in appearance, gaunt and deathly pale, with a scar beneath his left eye and is constantly carrying a gun. Katana works as a man-for-hire, living on the garage-level of an abandoned building on the edge of a junkyard in Night Town. Dark, cold and stoic by nature, Katana lives alone, having no friends and seemingly not wanting any. However, Katana develops a very strong and almost obsessive attachment to Saiyuri over the course of the story, her disappearance becoming the main motivation for his actions near the end of the series. Another person important to Katana is Radigue, who acted as Katana's father after his family died in a shipwreck and is most likely to be the originator of Katana's secret enjoyment of building machinery and digging up Heavy Metal parts. Personality-wise, he shows no interest in much of anything but money and rising to the top of the criminal ladder, his grand intention to rule over Night Town. While not evil, Katana is a sociopath.
Katana is a very proud Heavy Metal operator, having built his first one in the series, Seven, himself. However, early in the series, it is destroyed by Lightning and later replaced with Katana's Techode, Zero. Katana becomes very bitter about the loss of his original Heavy Metal, and although Zero is stronger his attachment to Seven never truly leaves him, and its destruction becomes the basis of his rivalry with Hajiki, a rivalry that eventually grows into a battle to show who is the bigger man. His need to prove that he is better grows into an insane obsession over the course of the story.