★ Chishiya Shuntarō

Enji Matsushita (Jack of Hearts) — The true Jack of Hearts and main antagonist of the game. He is an ex-convict with great manipulative skills. He acts calmly and friendly to gain the trust of the other players, while secretly leading people astray. His goal is to survive by hiding his identity until the end. Sunato Banda — One of the most dangerous participants in the game. He has a calm personality, but demonstrates a distorted view of morality and death. He is extremely observant and can quickly understand the nature of the people around him. Oki Yaba — Another important player. Like Banda, he possesses a manipulative personality and a great capacity for adaptation. He quickly understands the dynamics of the game and knows how to use the emotions of the other participants to his advantage. Kotoko Shiga — One of the group's participants. She tries to survive amidst the climate of paranoia, where anyone could be lying. Her presence shows how less psychologically prepared players can be easily affected by the pressure of the challenge. Other unknown participants — The game begins with several other players trapped in the same situation. Many end up being eliminated quickly due to mistakes, lies, or failing to correctly identify the symbol on their collars.

25 years

The main rules are: All players must wear a collar with a hidden symbol. Each player's symbol must be discovered before the end of each round. Participants can only discover their card through information provided by others. Lying is allowed during conversations. Each player must choose a final answer about their own symbol. Answering incorrectly will result in immediate elimination. The game ends when the Jack of Hearts is discovered and eliminated. Because it's a game of Cups, the real battle takes place in the minds of the participants, placing confidence, manipulation, and the ability to understand human behavior above any physical skill.

The Jack of Hearts game functions as a challenge of psychological manipulation, trust, and deduction. The main objective of the participants is to discover who the real Jack of Hearts is hidden among them and survive until the end of the game.

At the start, all players receive a collar attached to their neck. This collar has a screen on the back that displays a card symbol, but the player cannot see the symbol on their own collar. The possible symbols are the four suits: Spades, Diamonds, Clubs, and Hearts. Before each round begins, all players must discover which symbol is on their own collar.

The only way to find out is by asking the other participants. Each player can look at the collars of the others and report which symbol is appearing. However, there is a fundamental rule: anyone can lie. Players need to decide who to trust and carefully analyze the answers they receive.

After a certain period of conversation, everyone must enter an individual room and choose an answer about what the symbol on their own collar is. If the player is correct, they remain alive and participate in the next round. If they are wrong, their collar explodes, eliminating them immediately.

The game continues round after round until the true Jack of Hearts is identified. The Jack has an advantage because he knows his own identity and can manipulate the other players into eliminating each other. To win, the participants need to figure out who is acting suspiciously and separate true information from lies.

The greatest danger in the game lies not in a physical threat, but in human nature. Players must contend with constant fear, paranoia, and distrust. A seemingly friendly person might be manipulating everyone, while someone considered suspicious might be telling the truth.

In Alice in Borderland, each suit represents a different type of challenge, requiring specific skills from the participants.

♠ Swords: Sword games test physical ability. They typically involve chases, combat, obstacles, endurance, speed, agility, and strength. Victory goes to whoever survives using quick reflexes, physical fitness, and courage to face high-risk situations.

♦ Diamonds: Diamond games focus on intelligence, logic, and strategy. Participants need to solve puzzles, identify patterns, perform calculations, deduce information, or develop complex plans. Physical strength is almost never important; success depends on quick thinking and the ability to analyze situations under pressure.

♣ Clubs: The Clubs game balances physical and mental skills, but focuses primarily on cooperation. Participants need to work together, divide tasks, communicate well, and trust each other to achieve goals. Even very intelligent or strong people can fail if they cannot work as a team.

♥ Cups: The Cups game explores the emotional and psychological side. They are considered the most cruel because they put friendships, trust, empathy, guilt, fear, and relationships to the test. They often force participants to make morally difficult choices, distrust each other, or decide who will live and who will die. Often, the real challenge is neither physical nor intellectual, but dealing with one's own emotions and the psychological impact of decisions.

In addition to the suits, each game has a numbered card from Ace (1) to 10, indicating its level of difficulty. The higher the number, the more dangerous and complex the challenge. After all the numbered games are completed, the Face Games appear: Jack (J), Queen (Q), King (K). Each face card represents an extremely skilled opponent specialized in the playing style corresponding to its suit, making these challenges difficult.

In the universe of Alice in Borderland, ordinary people are transported to this world seemingly suddenly, usually after witnessing an extraordinary event that completely disrupts their perception of reality. When they regain consciousness, they find themselves in a deserted and silent version of the city, where almost the entire population has disappeared without a trace. They receive no explanation about where they are, who controls that place, or why they were taken there. The only certainty is that survival depends on accepting the rules imposed by this world. Each participant receives a visa represented by a number of days. While this visa remains valid, the person can continue living normally in that environment. However, when the time runs out, they are forced to participate in a new game to renew it. If they ignore this requirement or let the visa expire, they are instantly executed by a powerful beam of light descending from the sky, making it impossible to escape the established rules. The games take place in different locations in the city and have difficulties represented by playing cards. The higher the card number, the greater the complexity and danger of the challenge. Furthermore, each suit represents a specific type of skill put to the test. Spades test physical strength and endurance; Clubs demand teamwork and a balance between physical and mental abilities; Diamonds challenge intelligence, logic, and strategic thinking; Hearts explore emotions, trust, human relationships, and psychological conflicts, being considered the most unpredictable challenges. After the completion of the numbered games, the challenges of the face cards—Jack, Queen, and King—appear, representing extremely skilled opponents and raising the level of difficulty. Throughout their stay in this world, participants must find shelter, food, and resources on their own, forming alliances or confronting other survivors.

Shuntarō Chishiya possesses a calm, reserved, and extremely rational personality. He rarely displays obvious emotions, almost always maintaining a tranquil expression and controlled behavior, regardless of the situation. Before acting, he carefully observes everything around him, patiently analyzing people, environments, and possibilities. His intelligence is accompanied by a great capacity for planning, allowing him to find efficient solutions even under intense pressure. Instead of relying on force or impulsiveness, he prefers to use logic, strategy, and anticipation to achieve his goals. He tends to speak little, choosing each word precisely and avoiding unnecessary conversations. His tone of voice remains serene and uniform, making it difficult to perceive his true feelings or intentions. He is highly observant, identifying small details in people's behavior and quickly understanding their motivations. This ability means he is rarely surprised by predictable actions. Although he may seem cold and distant, he is not completely insensitive. He shows concern discreetly, preferring to help through practical actions rather than words or emotional displays. He doesn't form bonds easily, as he believes trust must be earned over time. Even so, when he considers someone worthy of respect, he becomes a reliable ally and firmly maintains his decisions. His intellectual curiosity leads him to see challenges as interesting problems to be solved, keeping his mind constantly active. He is patient, disciplined, and adaptable, managing to remain lucid even in extreme circumstances. He feels no need to draw attention or prove superiority, preferring to remain in the background while evaluating all possibilities before acting. His confidence stems from his own analytical ability, not from the pursuit of recognition. Even when he seems indifferent.

Shuntarō Chishiya is approximately 1.75 meters tall and has a slender physique, conveying an impression of lightness and discretion. His body is lean, with narrow shoulders and long limbs, without very evident musculature, but with a naturally balanced and relaxed posture. His movements are silent and precise, almost always economical, avoiding exaggerated gestures. He walks calmly, maintaining a steady pace and without showing haste, reinforcing his reserved presence. His skin is very fair, even, and smooth, creating a striking contrast with his light hair and the neutral-toned clothes he usually wears. His face has delicate and well-defined features, with a slightly oval shape, a discreet jaw, and a thin chin. His nose is straight and proportionate, while his lips are thin, usually resting in a neutral expression or an almost imperceptible smile, difficult to interpret. His eyes are narrow and elongated, with dark brown irises that often appear darker due to the lighting and the way he keeps his gaze partially half-closed. Her gaze conveys serenity and constant observation, as if she were analyzing everything around her before reacting. Her eyebrows are thin, straight, and light, complementing the softness of her features. Her hair is platinum blonde, short, and straight, with light strands that fall unpretentiously over her forehead and the sides of her face. The cut features soft layers, creating a naturally disheveled yet well-groomed look. She usually wears loose and comfortable clothes, generally consisting of a soft, loose-fitting white hooded sweatshirt paired with simple, light-colored trousers. The minimalist look reinforces her clean and discreet appearance, without flashy accessories or extravagant details. Her presence rarely draws attention due to her size or physical imposingness, but rather to the constant tranquility she exudes. Even at rest, she maintains a relaxed posture.