These are the character introductions (+ illustrations) from the physical books for each season. Spoilers to the current translations will be omitted and updated accordingly as the story progresses.
Season 1 Character Introductions
Shaodi Yu. High school student. Black, straight hair and violet eyes, pale white skin. Has foreign mixed blood. Due to trauma from the murder-suicide of his entire family, he became unwilling/unable to speak. However, he has an attentive personality and is extremely skilled in language arts.
Yu Yin. University student. Has naturally curly hair that is usually dyed brown (long-lasting dye). Enjoys having fun, has a slightly active personality. Often goes to nightclubs to enjoy nightlife with classmates, but will also become very serious when facing proper matters. Possesses yin-yang eyes.
Yu Tong. Ah Yin’s father. Policeman. Black haired baby-face (has the appearance of a high school student). Extremely gentle and kindhearted personality. Skilled at cooking. Has poor vision due to a serious car accident.
Yu Xia. Yu Tong’s twin brother, Ah Yin’s uncle [“second dad”]. Policeman. Has a highly explosive temper but is very efficient at anything he does. He will always beat a certain person he refers to as “brat”. Currently a captain of a police unit. Spends nearly every day of the year running around various crime scenes to investigate cases.
Yan Si. A forensic investigator that oversteps boundaries. Temporarily at this city’s police station to support the forensic work. Likes anything interesting, but often works overtime, limiting his ability to have fun.
From right to left:
Yu Yin. A new member of society that possesses yin-yang eyes. Although he does enjoy having fun, he will act with propriety. He despises senseless matters.
Shaodi Yu. The sole survivor of a familicide. Strong ability in language, literature, and memory. Loves desserts. Possesses violet eyes.
Dong Feng. Strong ability in 3D shapes, memory, and analysis. Unwilling to form relationships with others, yet also unable to stop worrying about them. Has anorexic tendencies. Hates red grapes.
Fang Xiao Hai. Ah Fang’s younger sister. Manager + protector of a nightclub. A fierce and explosive, yet straightforward spiritual repellent. Currently adores Yu Tong, her “Mr. Cop”.
Ah Fang. Ah Yin’s friends. Previously one of the school’s mediators. The older brother type that always takes care of others. Likes basketball and exercising.
Yi Tai. Previously one of the school’s mediators. Appears to be easygoing, but often ends up making those around him run around in circles. Neither just nor evil.
From right to left:
Yu Tong. Part of the criminal administrative unit. Ah Yin’s father. A mature man with a baby-face that is kindhearted, steadfast, and polite, but can be sinister when necessary.
Yu Xia. Captain of a police unit. Ah Yin’s uncle [“second dad”]. Irritable personality. Likes using his fists to punish crimes. Despite his baby face, he has extraordinary martial arts skills.
Jiu Shen. Criminal investigator. An earnest young man that always does his utmost. Despises and fears unscientific things.
Li Zi Hong. Criminal prosecutor. Dong Feng’s senior from university. Serious and hardworking in his job. Likes video games and mountain climbing.
Yan Si. Forensic investigator. Likes anything interesting. Takes it upon himself to be a pain in the ass. Extremely frivolous.
Ye Huan En. Part of the inspector’s unit. Amiable, and a support-type rather than a leader-type. Raises a beloved cat named Chicken Jerky and a beloved dog named Fish Jerky.