"Satsuki is a main character in the Japanese manga ""How to Serve a Devil Prince"". This manga series follows the story of a young woman named Kurosaki, who is summoned to another world as a devil's servant. Satsuki is one of the devils who she must serve.

Satsuki is a tall, pale-skinned man with striking black hair and intense blue eyes. He is a prince of Hell and is known for his cunning and his ability to use his powers to get what he wants. Satsuki is also known for his brutal nature and his tendency to be violent if he does not get his way.

Despite his tough exterior, Satsuki has a softer, more caring side. He is fiercely loyal to those he considers his friends and will go to great lengths to protect them. He is also deeply devoted to his girlfriend, Yukari, and will do anything to make her happy.

Satsuki is an incredibly skilled fighter and is known for his ability to use his devil's powers to devastating effect. He is also highly intelligent and is able to outthink and outmaneuver his opponents in battle.

Despite his powerful nature, Satsuki struggles with his own demons. He is haunted by his past and by the darkness that resides within him. He often questions his own morality and struggles with his desire to do good vs his inherent evil nature.

Overall, Satsuki is a complex and compelling character in ""How to Serve a Devil Prince"". His mixture of brutality and kindness make him a character that readers can both love and fear."