Their sashimono are a brilliant scarlet; and their helmets, body armour, and their mounted troops' harnesses are the colour of blood.
Also, there are elite warriors, and they have distinctive golden horns on their helmets, some are twisted, signifying its owners higher status. Even Jack, with his Two Heavens technique, had trouble fighting one, and it took Yamato and Akiko to help him out. But fortunately, Sensei Hosokawa stabbed him through the chest from behind. Tragically, during the massacre, Sensei Nakamaru was surrounded by Red Devils and was supposedly killed. This triggered a retreat to the inside of the castle, and Taro was soon killed by an Elite Devil.