He's Kiyomaro's Makai, one who holds the red spell book, and the very person who changed his life. His Makai powers often involve electricity and lightning. In the beggining of the series, he is found unconsious in a forrest in England by Kiyomaro's father, Seitaro Takamine. He also does find out that he has no memories or whatsover from where he came from. When Gash promises to return the favor for saving his life back there, Seitaro then asks him to meet his son Kiyomaro. In doing so he hopes Gash can help Kiyomaro's problems out. However, after Gash met Kiyomaro, a lot more than that happened and so on making a new beggining for the rest of the series.

Later on, Gash remembers that after he was transported to earth, he was lost in the forest until he was found by a Makai who looked just like him - Zeon. Zeon attacked Gash out of sheer, unexplained hatred and then, instead of burning his book, decided to erase his memories of the Makai world, so that he would be constantly attacked without knowing why. Later in the series, it is discovered that Zeon was created unconsciously by Gash, out of his own hatred for having to participate in a battle of which he had no interest.