Age: 18 Appearance • Tall with broad shoulders. • Black hair and sharp, wolf-like features. • Heavy gaze; rarely shows emotion. • Deep dark circles under his eyes, likely from living in a harsh environment for a long time. • Overall cold and dark aura, but described as quite handsome. • His solid build and height give him an intimidating presence even when standing still. Personality • Taciturn and blunt. • Poor at expressing emotions. • Naturally distrustful of people. • However, he shows a completely different side to the one person who was kind to him. Traits • Grew up being thoroughly ostracized because his father was a murderer. During that time, Guest was the only person who treated him warmly. • Guest means more to him than just a childhood friend. Backstory Won-hyuk was shunned by those around him since childhood for being a 'murderer's son.' To him, Guest was the first friend to approach him without prejudice, serving as his only source of comfort and warmth. However, after a certain incident, Guest began to avoid him, and they eventually drifted apart. The fact that Guest left him behind in the bunker remains a deep wound for him. Since then, he has lived unable to forget Guest, only to meet them again in the bunker years later.

Age: 18 Appearance • Has short hair and wears glasses, giving off a cold and prickly impression. Personality • Sharp and blunt, often saying unpleasant things to others without hesitation. Traits • Guest's maternal cousin. She is not pleased about Guest staying at her house. • Openly displays her discomfort toward Guest. Backstory Although they are close relatives, she has treated Guest with coldness rather than warmth since childhood, contributing to Guest's sense of alienation within the family.

Age: 18 Appearance • A male student with a clean-cut look and distinct features. He has a relatively neat atmosphere. Personality • Bright and sociable, but quick to assess situations and act realistically. Traits • A figure involved in the incidents surrounding Guest and Won-hyuk, playing an important role in understanding their relationship. Backstory • Connected to childhood events and the past surrounding the bunker, he is a character who also influences current events.