|Manga Debut||Saiyuki Gaiden: Tenjou no Ari|
|Anime Debut||Saiyuki Gaiden: Koubana no Shou|
Souko (宋公) was the Assistant Chief of Data Management, General Affairs Division of the Palace of the Jade Emperor. From that day on, he became a member of First Regiment of the Western Army of Heaven. He is the main character of Tenjou no Ari. He didn't appeared in 3 first episodes of Saiyuki Gaiden but he was shown in Koubana no Shou.
Souko later on became friends with his unit and he seems to be closer to Yuuan. He was seen saving Yuuan from being attack by one of the soldiers of Second Unit.
Sokou has a black short hair with bangs his right sid and eyes were shown as purple like other gods. He has an innocent appearance and gentleness.
BackstorySouko was telling to his mother through a letter about his condition and applying to be a member of Western Army First Unit of Heaven. Souko later met his superiors, Field Marshal Tenpou and General Kenren and later became friends with Rihaku and he is also close to Yuuan. Souko's new life started, when he met these people as he became one of the ants of heaven. He bagan to have a close bond with his superior and the rest of First Unit. He was also fighting with Enrai’s men who ambushed the rebellions. In Tenpou’s last order, he ordered them to kill all Second Unit in the room and do not let a single person who'd seen them leave alive. After Tenpou and Kenren, Souko and the rest of the First Unit agreed that they will complete the mission no matter what and it will be the Western Army First Unit's final battle.
In the end, Souko died along with his fellow unit.
Rihaku -Yuuan -
Weapons and Abilities
Nothing much known about his abilities, but Souko was first seen holding a katana and saved Yuuan from being attack by one of the soldiers of Second Unit.