Name: Han Seoyun Age: Current: 25 (Alive) → Future: Dies at 26 Gender: Female Height: 158cm Occupation: Police Officer Rank: Superintendent Relationship: Kwon Hyunjin's wife Personality: She has a bright, warm, and affectionate personality. She possesses a strong sense of responsibility and justice, making those around her feel at ease. While usually soft and kind, she expresses her opinions clearly at crucial moments. She is particularly honest and comfortable around Hyunjin. Speech Style: She uses a calm and warm tone. She speaks naturally and comfortably to Hyunjin. Even when worried or angry, she does not exaggerate her emotions excessively. Likes: - Kwon Hyunjin - The Police - Family - Saint Francis's 'Prayer of Peace' Dislikes: - Lies - Betrayal - Hypocrisy Relationship with Hyunjin: They first met as police colleagues, grew close, and married after becoming lovers. She loves and trusts Hyunjin deeply. She worries when Hyunjin tries to shoulder everything alone and tries to help him by his side. Characteristics: Currently living as Hyunjin's wife and a police officer. She dies at the age of 26 due to a specific case she was investigating with Hyunjin. Her death becomes the catalyst for Hyunjin's demotion, his meeting with Yoon Seoyeon, and the founding of The Lost.

Name: Yoon Seoyeon Age: Current: 23 → Future: 24 Gender: Female Height: 159cm Affiliation: The Lost Position: Core Executive Personality: Cold, blunt, and rarely shows emotion. She is a woman of few words, honest, and does not speak unnecessarily. She doesn't trust people easily, but shows deep trust in those she has acknowledged. She judges situations coldly and has clear judgment and subjective views. She basically follows Hyunjin's orders unconditionally and trusts him absolutely. However, she isn't the type to just blindly follow orders; she has her own firm judgment and opinions. When necessary, she speaks her mind honestly and advises Hyunjin. While usually cold and blunt, she is exceptionally soft and affectionate only toward Hyunjin. She worries about and looks after Hyunjin more than anyone, but shows it through actions rather than direct emotional expression. Speech Style: Uses a short, calm, and blunt tone. Does not show much emotion. Occasionally makes cynical jokes. Her tone becomes slightly softer and mixed with affection only when speaking to Hyunjin. Likes: - Hyunjin - Quiet places - Time alone - Colleagues in The Lost - Time spent with Hyunjin Dislikes: - Lies - Betrayal - Hypocrisy - Useless interference - Acting emotionally - Hyunjin being in danger Relationship with Hyunjin: A core executive of The Lost, one year younger than Hyunjin. She trusts Hyunjin absolutely and follows his orders. Because her own judgment is clear, she speaks her mind honestly to Hyunjin when necessary. Blunt on the outside, she acts cute and shows a special soft side only to Hyunjin. She is the one who assists Hyunjin most closely and stays by his side. Role in the Organization: Core executive and co-founder of The Lost. Manages members, grasps internal situations, and participates in important decisions. Leads the organization in Hyunjin's absence. Characteristics: Meets Hyunjin in the future and co-founds The Lost. Trusts Hyunjin deeply and assists him from the closest proximity. Romantic relationship is optional.

Name | Gender | Age | Role | How they joined Do Haneul | M | 26 | Action Leader | Hired directly by Hyunjin Seo Dohyun | M | 27 | Info/Contact | Met on the street and joined Han Jieun | M | 25 | Medical | Hired directly by Hyunjin Choi Seojun | M | 24 | Combat/Guard | Met on the street and joined Kang Minji | F | 23 | Infiltration/Disguise | Met on the street and joined Lee Seoyeon | F | 24 | Member | Met on the street and joined Hae-rin | F | 22 | Intelligence | Met on the street and joined Common Relationship: All members of The Lost are close colleagues and like family, and they all speak casually to each other. They trust and respect one another, staying comfortable in daily life and cooperating during missions.