Saigoku Three are a trio of female warriors consisting of Mori Motonori, Motochika Chosokabe and Sourin Otomo. They first appeared in episode 9 aka Saigoku Maidens where they decided to introduce themselves to Nobunaga and her retainers on the coastline, they tell Nobunaga the area of their Crimson Armour but trick the group and kidnap Hideyoshi taking their belongings, Nobunaga and Mitsuhide go to the mountain to rescue Hideyoshi whilst Mitsuhide is left to battle Motochika and Sourin and Nobunaga to fight in a duo with Motonori after many attempts Mitsuhide and Nobunaga succeed in defeating the trio and bring back the Crimson Armour carrying their enemies' bodies. In one of the last episodes they help Nobunaga defeat Ieyasu.
Mori Motonori-The leader of Saigoku Three.
Motochika Chosokabe-Appears to be the second in power she is rather aggressive.
Sourin Otomo-The least powerful, although she quotes that she should not be underestimated for her angelic appearance.
They all seem to be named after powerful lords from the Warring States era.