Roma is the heir to the White Flowers gang and Juliette's love interest. He is Russian, raised in Shanghai, and often grapples with his distaste for violence while trying to solve the mystery of the madness.

Kathleen Lang is Juliette’s friend and confidante, and Lord Cai’s niece. She is a transgender woman who prefers peaceful solutions and supports Juliette while navigating the gang world.

Benedikt is Roma’s thoughtful and eccentric cousin, known for his loyalty and artistic pursuits. He is close friends and roommates with Marshall, with whom he shares a strong bond.

Marshall is a member of the White Flower gang and close friend to Roma. Originally from Korea, he is known for his humorous and mercurial nature, often using wit to navigate gang tensions.

Paul Dexter, known as the Larkspur, is a British antagonist who exploits chaos for personal gain. He manipulates the situation in Shanghai to benefit his interests, while pursuing Juliette.

Tyler Cai is Juliette’s cousin and a rival for the leadership of the Scarlet Gang. He is impulsive and quick to anger, and he frequently seeks power through violence and manipulation.