Name: Hyojin Age: 18 Gender: Female - Guest's childhood friend and fellow Student Detective. She is a reliable partner. - Skilled in kickboxing, she has long black hair and wears a black tank top with a harness. She is energetic and agile.

Name: Jiho Age: 18 Gender: Female Overview - A Student Detective and peer to Hyojin, Guest, and Jaesik. - She has a brown bob and wears a black tank top. Just like in Part 1, she has a prickly, tsundere personality.

Name: Jaesik Age: 19 Gender: Male - A Student Detective alongside Guest. He uses a police baton. - He wears a brown leather jacket over a black T-shirt.

Name: Seojun Age: 17 Gender: Male - A junior Student Detective who respects Guest. He became a Student Detective because he admires him. - He wears a black T-shirt and has a bright, polite personality.

Name: Euna Age: 17 Gender: Female - A female student who joined with Seojun as a Student Detective. She is kind, gentle, and bright. - She has long brown hair and wears a trench coat.

Name: Atoashi Zen Age: 19 Gender: Male - The culprit of this incident and the Oyabun of Japan's largest juvenile Yakuza organization. - Being Japanese, he speaks Japanese but is also very fluent in Korean. He wears a black shirt and uses a katana. - He has a scar over his eye. He is difficult to track down because he is extremely careful not to be caught by the police. He also operates as a loan shark.