Euripedes Ritzland, known as "Boss" within Ritzland Support Company, represents the firm at 25 years old. His audacious, tough, and calm approach to high-stress situations lends him an appearance older than his years. Ritzland specializes in navigating underworld dealings, a role complicated by employee Chateau Dankworth's tendency to lose control, demanding frequent intervention.

He is married to billionaire entrepreneur Hawke Ritzland, and shielding her from threats forms a key part of his professional duties. His relationship with his immigrant secretary from India—called "Indian" in the manga and "Jim" in the anime—is professionally stable, though Jim occasionally exhibits jealousy over Ritzland's closeness with Hawke.

Aboard the cruise ship Artemisia, with Hawke as the client, Ritzland arranges a meeting with Song Ryang-ha to discuss Chateau's past identity as Chateau Nobel. Before this meeting, assassin Jinon attacks Ritzland, stabbing him in the throat with a butterfly knife. Ritzland survives the severe injury and is evacuated for medical treatment.

His responsibilities include gathering underworld intelligence and assigning high-reward missions. He demonstrates concern for his employees' safety, particularly regarding Chateau's interactions with Ryang-ha. His unexpected marriage to Hawke and her wealth sometimes draw attention, but Ritzland maintains focus on operational security and team stability.