Sten was one of the Four Rakshasa Demons. Sten was a serious and cruel person who was willing to kill anyone who was the Prime Minister's enemies, even innocent bystanders. Whenever he kills a person, he preferred to call it "releasing their souls". Being one of the Four Rakshasa Demons, Sten is a very strong physical fighter with immense strength that could overwhelm Teigu users in battle. He is an expert in hand to hand combat and prefers to crush his enemies with his bare hands.