Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion. The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes.
Ryu, the stage name of Ryan Patrick Maginn from Styles of Beyond; Characters. Kairyu, Dragonite (Pokemon species) in Japanese Version; Ryu Hayabusa, the protagonist in the Ninja Gaiden series; Ryu (Street Fighter), a leading character in the Street Fighter video game series; Ryu Nakanishi, Science Ninja Team member G-5
Although Ryu manages to find and defeat him, Doku's last resort is an attempt to transform the Ninja into a Fiend, but the transformation is only partial as Doku's disembodied spirit fades away.Doku returns in Ninja Gaiden: Dragon Sword as a malevolent spirit haunting the ruins of Tairon, capital city of Vigoor.