Dynasty Soldiers are supernatual creatures who appear in the Japenese television anime series Yoroiden-Samurai Troopers (鎧伝サムライトルーパー), also known as Ronin Warriors(they are called Youja or Youja-hei in YST).
The Dynasty Soldiers are spirits, possibly of demons and/or evil humans who submitted to the dynasty, trapped within suits of dark green armor who serve under the rule of Emperor Talpa (Arago in YST). They wield various weapons, including chained sickles and spears. The only way to kill a Dynasty Soldier is to decapitate it or slice its armor. Dark smoke rising from the armor signifies it's death.
The Dynasty Soldiers were difficult adversaries of the Troopers in the beginning of the series. However, as time went on, the Troopers grew stronger and the soldiers simply became annoyances who stood in their way. By the end of the series, after Talpa's second defeat, the fate of any remaining soldiers remains unknown.
There are no Dynasty Soldiers in the original video animations (OVA). In Gaiden the main villain's army consisted of ninja. In Kikoutei Densetsu (The Legend of the Inferno Armor), Mukara did not use any lackeys. Neither did Suzunagi, who was the last villain to appear in Message. Dynasty Soldiers do not appear in the Samurai Troopers manga. Instead they are replaced by more appearances by the Dark Warlords and their creatures. Dynasty Soldiers appear in very few YST doujinshi, and they are mostly background characters.