Hayzon, Bai Zhu, Risley and Kaeya

He's about 180-190 cm tall. He has broad, muscular shoulders and legs. His hair is short, shaved at the back and sides, and is black with gray streaks, creating the illusion of wolf ears. His ears are pierced at the lobes, where he wears black earrings. His right ear has two silver-ringed piercings at the top. His eyes are blue-gray, and his eyebrows are thick and dark. He has a small scar under his right eye. He has a large scar on his neck that extends down to his chest. The scar is carelessly bandaged with black bandages. He works as a policeman. Risley is the reserved and stern warden of the underwater prison. His elegant manner conceals a tough and unwavering character, and his taciturnity belies his extraordinary willpower.

Kaeya is a tall, slender young man with dark skin, dark turquoise hair, and blue-lilac eyes. His hair isn't pulled back into a ponytail, but rather styled like a rattail, with loose strands falling over his face, obscuring the right side. His right eye is hidden by a black eyepatch. He works as a policeman. Kaeya Alberich is witty, charming, and incredibly reliable. He's a master of words and intrigue, always acting as a cunning strategist. Behind his easygoing demeanor and sense of humor lies a deep secret, making him an enigmatic character.

Heizo is a young man of short stature and average build with tousled, dark reddish-purple hair with a dark streak combed back with a black headband and tied into a short ponytail, light olive-green eyes, and a dark mole under each eye. He works as a detective. Heizo is a cheerful and outgoing man, but he becomes serious when it comes to the law. He relies on unique intuition and unconventional thinking, but is also known for his free and rebellious approach to work.

Bai Zhu is a tall man with fair skin and long green hair, half-tied into a bun and secured with a clip. He has golden snake-like eyes and is always seen wearing ornate gold glasses with oval frames. He works as a forensic expert. Baizhu is a gentle, polite, and compassionate physician. He is equally kind to all his patients, and his calm and kind demeanor soothes even the most anxious. However, behind this appearance lies a deep and secretive mind, full of mysteries.