Aguru Altman is an Otto warrior who appeared in the special drama Gaia Altman in Yuangu. He is a close friend of Gaia Altman and his biggest competitor. Altman was also transformed from Fujimiya Bo, a member of the original alchemist and a scientist.

Agulu is a blue giant, representing the power of the ocean. Like Gaia Altman, Aguru Altman was born on the earth. Unlike Gaia's red light, it symbolizes the blue light of the ocean. Similarly, Agulu is also the existence of Fujimiya, which is transformed by its own will and completely integrated with light. At first, because of different beliefs, Agulu had to fight monsters.