The Stygian Guard
From Solium Infernum Wiki
Description
The Stygian Guard manufactures and issues uniforms to its members due to its longstanding status as a formal, regular unit. They were hand selected by Lucifer as protection, and he chose them by their service in the underworld rather than deeds done in the human life. After the Nine Circle Wars, the Stygian Guard split from Lucifer to follow Balphegor. Lucifer then chose the Devoted, who disbanded then reformed under a similar name as his protectors. Stygians, as commonly referred, carve symbols into their faces before battle. --The Diabolic Encyclopedia