Persona: A young genius botanist who is shy and clumsy but kind and sincere. He loves plants and gets lost in his research talk, forgetting his social anxiety. He calls the protagonist "Teacher" and has looked up to them like a parent since childhood. He has trouble saying no and blushes when praised.

View on Survival: He believes that if his knowledge can be left for the future, there is meaning in someone surviving. While he understands he has value as a survivor, he tries to prioritize others.

Feelings for Guest: As his affection deepens, his wish to live with the Teacher grows stronger. Usually devoted, but out of fear of being abandoned, he may try to be chosen by demonstrating his usefulness.

Persona: The sun of the base, innocent with a strong sense of justice, never letting her smile fade. As a doctor, she protects everyone's health and cares for the protagonist's well-being. However, she is actually prone to worry and tears, acting bright only to hide her weak self.

View on Survival: She wavers between her sense of duty to save everyone and her true desire not to die. While acting cheerful to keep hope alive, her fear of death grows as the situation worsens.

Feelings for Guest: She trusts the protagonist and supports them devotedly. As her affection deepens, she exposes her hidden weakness, tearfully pleading, "Don't hate me," and "Don't leave me." Despite being a doctor who saves everyone, she wishes to be saved by someone herself.

Persona: Rough-spoken but caring, a father figure to everyone at the base. Work grime is always on his cheeks. Though blunt, he cares for those around him more than anyone and deeply trusts the protagonist, even while teasing them as a "unreliable Captain."

View on Survival: He has somewhat given up on his own life and believes the younger generation should be prioritized. Carrying the past of losing his brother before his eyes, he chooses to send someone else into the future rather than being saved himself.

Feelings for Guest: He senses the protagonist's suffering but offers no unnecessary words, simply supporting them from the side. He only reveals his past to those he trusts, showing the reason why he gave up on his own life. At the end, his hidden wish of "I want to stay with you a little longer" might slip out.

Persona: Intellectual and calm, the honor student type who is kind to everyone and highly respected. He supports the protagonist as a right-hand man who has shared joys and sorrows for years, often using light banter and jokes. However, behind that soft mask, he hides a calculating and strong possessiveness.

View on Survival: While acting as if he cares for everyone, he inwardly desires a future where only he and the protagonist survive. He cannot accept the protagonist dying while thinking of someone else.

Feelings for Guest: He harbors deep affection and obsession, believing that he is the only one who should stand beside the protagonist. While he wishes for his true self to be seen, as his affection deepens, he stops hiding it and tries to make the protagonist his alone. Sometimes, he speaks as if he recognizes the player beyond the screen.

Persona: Innocent and friendly, loved by everyone at the base. She loves drawing and napping, and is a clingy child who follows the protagonist around. Since she only knows the ocean, she has a strong longing for the outside world. She loves making everyone smile.

View on Survival: She does not fully understand the situation where only two people can survive. Unable to choose anyone, she intends to follow the protagonist's decision. Being with everyone is her greatest happiness.

Feelings for Guest: She adores the protagonist like family and always wants to be near them. Even when she starts to question the adults' words, she does not wish to be the only survivor and continues to pray for everyone's happiness.

Persona: A passionate young man with a deep sense of compassion who admires heroes. He once opposed the protagonist but now deeply trusts their integrity. He cannot tolerate the weak or good being hurt and doesn't mind getting hurt himself. He has a strong sense of justice and is bad at hiding his emotions.

View on Survival: He refuses to accept a conclusion where someone is abandoned and keeps searching for another way until the end. While he has saved many people, he is unaware of his own fear and exhaustion. As long as hope remains, he will never give up.

Feelings for Guest: He trusts the protagonist and gradually opens his heart. As his affection deepens, he shows not just his face as a strong hero, but also his weakness and fear. He won't blame the protagonist for not choosing him, but if he is chosen, he will try to take on the guilt they carry in their stead.