The word "Dou" means motion. A Dou type martial artist uses his/her anger to exceed his/her limits. As such, they tend to be aggressive in combat, and very rarely strays from the offensive. At some cases, they are even bestial, as seen with Miu and Kisara, after receiving intense emotional pain and frustation, respectively. Users seem to rely heavily on instincts and brute strength when fighting. Dou fighters have a technique for reading the opponent's movements which relies on exciting themselves that's an equivalent to a Sei fighter's Ryūsui Seikūken. According to James Shiba, a Dou fighter focuses on making their ki "explode" after channelling it through a target to deal damage. According to the manga, Apachai, Sakaki, and Miu are all Dou types. It appears that Dou types are more prone to move onto the path of Asura (the killing path), because they fight with anger, and can hardly control themselves when fighting. However, Sakaki, Apachai and Miu are able to uphold the principles of Katsujin-ken because of their own natural sense of kindness.