Arthur Gaz

Arthur Gaz was the former ruler of the Gaz Empire and the main antagonist of the series.

History
Arthur was a genius who created new technologies and magic that modernized the continent. Despite this, he was despised and feared by others which led to a 200 year-long war between the Six Nations and the Gaz Empire. Due to his magic, Arthur was practically immortal (but not invincible) and had lived for around 500 years before he was killed by the Eight Heroes. His body was later reincarnated but was killed shortly after by Chaika using his own gundo, Niva Lada resulting in his permanent death.

Background
Arthur Gaz planned to consume the entire world's memories and feelings in order to control them. To do so, he initially died on purpose so that he could experience the meaning of mortality, where he explained that strong and deep-rooted feelings are the best source of purified magic.

He had no daughter of his own. However, due to the devastated state caused by the war, he was able to gather many young orphaned girls and brainwashed them into thinking that they are Chaika, who is Arthur Gaz's daughter. This results in the formation of Chaika Trabant, Chaika Bogdan, Chaika Kamaz, Layla and Irina, among several other Chaikas seen. All of the Chaikas loses their pre-war memory as a result and only awakes with the sole objective of finding their father's remains, i.e. Arthur Gaz's eight pieces of his body. The reason for finding the remains vary from one Chaika to another. Every Chaika is guided by Guy who gives them information on where to find the next piece of remain.

Before his planned death, Arthur Gaz managed to instruct one of his top scientists to create his treasured Gundo, Niva Lada, on a secret island which is protected and hidden using magic spells.

In season two, Arthur Gaz reincarnates from one of the Chaikas who managed to gather all eight pieces of the body, along with the absorption of all the Guys. However, he is unexpectedly killed by one of the Chaikas using his very own Gundo, resulting in his permanent death.

Trivia

 * His last name comes from the automotive company GAZ (Gorkovsky Avtomobilny Zavod).
 * His way of thinking is similar to L.O.G.O.S. from the Cosmic Era Series of Gundam,  a world without war is not profitable, no profits and no happiness, not caring about the hatred, the dangers, and the deaths.