Al Bowen is one of the two genius twins that worked for the Egrigori. As the twins were ostracized by their peers for their superior intellect, Egrigori took them in and had them use their skills to create weapons.

Al uses his cyborg Minus to fight the ARMS, as the twins were sent to capture them. However, the twins used this opportunity to terrorize the school in Aisora and were soon under threat by the Egrigori. After being saved by Ryo, Hayato, and Takeshi, Al joins them in their fight against the Egrigori.