Sten is a large man with a heavily muscled build, similar to Ibara. He has a long braided hairstyle, with hair sticking far out at the sides, and bald at the top of his head. He has a long bushy beard and mustache, bushy eyebrows, and dark prominent circles around his eyes. Similar to his fellow Rakshasa Demons, he wears armor plating on his forearms. He also wears a large Iron pauldron on his left shoulder.
Sten is a serious person who was willing to kill anyone who are the Prime Minister's enemies even innocent bystanders. He also had a tendency to say that whenever he kills a person, he prefers to call it "release their souls".
Sometime in the past, Sten trained Prime Minister Honest in martial arts.
Sten and his companions came to help Elite Seven to defeat Oarburgh clan. He helped Gozuki to get back to healthy. Later when other Rakshasa Demons and Elite Seven started ambush, Sten alongside with Mez and Elite Seven members fought Gilberda. After they defeated her they came to help Suzuka and Ibara with killing Cassandra.
Sten and his fellow demons were tasked with protecting Bolic from Night Raid. Sten with Mez found Lubbock as Night Raid member. When they thought that Lubbock is dead, they caught Pais. Sten tried to kill her. Then Lubbock, who was playing dead, came to save her. Lubbock tried to run away, after Pais was saved, but Sten rushed after him. Lubbo used it and he killed Sten.
Equipment and Skills
Being one of the Four Rakshasa Demons, Sten is a very strong physical fighter with immense strength that could overwhelm Teigu users in battle as shown giving Lubbock a hard time dealing with him in battle. He also possessed superhuman speed.
His signature move is Imperial Fist: Hundred Fists (皇拳寺百刹拳, Kōkenji Hyakusetsuken).