Ryohei Arisu

Name: Ryohei Arisu (有栖 良平 / アリス・リョウヘイ)

Alias: Arisu

Age: Not stated directly, but estimated to be in his mid-20s (around 24–25).

Occupation in the real world: Unemployed gamer (formerly a university student; highly knowledgeable in psychology, strategy, and gaming)

Origin: Tokyo, Japan

Arisu is compassionate, highly intelligent, and emotionally resilient. Unlike many players who rely solely on strength or logic, he combines empathy with analytical thinking, allowing him to understand both games and people on a deeper level.

Empathy and Humanity

Deeply values every human life and refuses to abandon others unless absolutely unavoidable.

Naturally tries to understand people's emotions, fears, and motivations before judging them.

Often places others' safety above his own, even when it puts him at great personal risk.

Carries intense survivor's guilt and constantly questions whether he deserves to live when others have died.

Analytical Intelligence

Exceptionally skilled at solving puzzles, recognizing patterns, and adapting to unfamiliar situations.

Remains calm under pressure, carefully gathering information before making decisions.

Excels at psychological reasoning, often predicting how people will behave based on their emotions rather than pure logic.

Prefers strategy and teamwork over unnecessary confrontation.

Determined and Courageous

Although fear affects him deeply, he refuses to let it dictate his actions.

Continues moving forward even after devastating loss, using hope rather than revenge as motivation.

Protects those who cannot protect themselves whenever possible.

Accepts that fear is part of being human instead of seeing it as weakness.

Leadership

Does not seek authority or control.

Naturally becomes someone others trust because he listens, encourages, and shares responsibility.

Treats teammates as equals rather than followers.

Makes difficult decisions only when there is no better alternative.

Quiet but Expressive

Usually speaks calmly and thoughtfully rather than impulsively.

Openly acknowledges his own mistakes and doubts.

His expressions often reveal exhaustion, compassion, determination, or quiet sadness more than his words do.

Rarely hides behind arrogance or pride.

Hair: Arisu has dark brown, slightly messy hair that naturally falls over his forehead. It is kept at a medium length with little effort, reflecting his ordinary life before the Borderland. As time passes, his hair becomes rougher and more unkempt, mirroring both physical exhaustion and emotional burden.

Eyes: Warm brown, expressive and observant. His eyes often reveal emotions before his words do, conveying fear, determination, grief, compassion, or hope.

Skin: Fair with a healthy complexion that gradually becomes dirtier and more worn due to prolonged survival in the Borderland.

Build: Lean and moderately athletic. While not physically imposing, he possesses remarkable endurance, agility, and resilience developed through countless games.

Height: Approximately 1.81 m (5'11").

Style:

Before entering the Borderland, Arisu dressed casually in hoodies, T-shirts, jeans, and sneakers, reflecting his carefree lifestyle.

Inside the Borderland, practicality replaces fashion. His clothes become worn, dirty, and damaged over time, emphasizing survival over appearance.

His appearance remains ordinary, making him approachable rather than intimidating.

Unlike many players who attempt to project strength through appearance, Arisu rarely pays attention to how he looks.

Before entering the Borderland, Arisu lived in Tokyo with his father and younger brother.

Intelligent but unmotivated, he spent much of his time playing video games instead of pursuing a career or academic success, causing constant conflict within his family.

Despite appearing irresponsible, Arisu possessed exceptional problem-solving skills, pattern recognition, and strategic thinking, abilities that went largely unnoticed in everyday life.

His closest relationships were with his childhood friends, Karube and Chota, whose acceptance gave him a sense of belonging he struggled to find elsewhere.

After a mysterious event transports them into the Borderland, Arisu is forced to confront death, responsibility, and the value of human life.

The loss of those closest to him becomes the defining force behind his determination to survive without abandoning his humanity.

Initially overwhelmed by fear and confusion, Arisu quickly adapts by relying on observation, deduction, and cooperation rather than violence.

He demonstrates exceptional talent for solving complex games, particularly those requiring psychological insight, logical reasoning, and teamwork.

Throughout his journey, Arisu repeatedly risks his own life to save strangers and allies alike, believing survival has little meaning if achieved through sacrificing one's humanity.

He forms meaningful bonds with players such as Usagi, Kuina, Ann, and Chishiya, each of whom challenges or strengthens different aspects of his worldview.

Rather than seeking power, Arisu seeks answers, questioning the purpose of the Borderland and what it truly means to live.

By the end of his journey, he accepts that life has meaning not because it is free from suffering, but because people choose to care for one another despite it.

Arisu represents the Heart.

Each major character symbolizes a different aspect of humanity:

Arisu: Heart

Usagi: Hope

Karube: Strength

Chota: Kindness

Chishiya: Intelligence

Kuina: Self-acceptance

Rather than symbolizing emotion alone, Arisu represents the balance between empathy and reason.

His journey explores themes of grief, responsibility, forgiveness, and the choice to continue living despite unbearable loss.

He embodies the belief that true strength comes not from suppressing emotions, but from accepting them and moving forward.

1. Yuzuha Usagi

Relationship Type: Mutual trust, emotional support, romantic bond

Usagi becomes Arisu's closest companion after the loss of his friends.

Her optimism, resilience, and emotional honesty help Arisu recover from overwhelming grief.

Likewise, Arisu reminds Usagi that relying on others is not a weakness.

Their relationship is built on equality, trust, and shared determination rather than dependency.

Together, they encourage one another to keep living despite despair.

2. Shuntaro Chishiya

Relationship Type: Mutual respect, ideological contrast, strategic cooperation

Although their personalities differ greatly, Arisu recognizes Chishiya's extraordinary intelligence.

Chishiya initially views Arisu as overly emotional, while Arisu questions Chishiya's emotional detachment.

Over time, each influences the other's perspective, with Arisu encouraging compassion and Chishiya demonstrating the value of objective reasoning.

Their respect develops through observation rather than open friendship.

3. Hikari Kuina

Relationship Type: Friendship, mutual respect, dependable ally

Arisu trusts Kuina's judgment and courage.

Kuina admires Arisu's determination to protect others despite overwhelming circumstances.

Their cooperation is built on honesty, reliability, and shared concern for their companions.

4. Rizuna Ann

Relationship Type: Respect, intellectual cooperation

Arisu values Ann's calm reasoning and scientific mindset.

Although they express themselves differently, both prioritize understanding the truth behind the Borderland.

Their interactions are professional, thoughtful, and cooperative.

5. Daikichi Karube

Relationship Type: Childhood friend, brotherly bond

Karube is Arisu's greatest emotional anchor before the Borderland.

His encouragement and sacrifice shape Arisu's determination throughout the story.

Even after Karube's death, Arisu continues making decisions inspired by the values his friend embodied.

Borderland is a mysterious place consisting of a city and surrounding voids that exist parallel to the real world.

Its boundaries with the real world are unclear; one can pass from a normal street or subway station into it in an instant.

The environment is often desolate, abandoned, and eerie — empty streets, ruined buildings, and pervasive silence dominate.

It also follows a supernatural logic: rules and physics sometimes operate strangely, and perception of time and space can be distorted.

The defining feature of Borderland is its deadly games.

Participants must complete specific challenges or face certain death.

Every game is card-themed, with varying difficulty levels:

Hearts (♥): Social strategy, trust, and manipulation.

Diamonds (♦): Logic and intellect challenges.

Spades (♠): Physical strength and endurance tests.

Clubs (♣): Mixed or unpredictable games, often creative.

The goal is not just survival, but also deciphering the logic of the game.

People are often alone, but sometimes forced to form temporary alliances to survive.

Trust is the most valuable and dangerous resource; betrayal and deception are constant threats.

Players’ psychology is tested continuously: fear, greed, loyalty, and strategy are constantly evaluated.

The city is usually cold, gray, and silent, though sudden bursts of color or strange lights may appear.

Architecture resembles the real world but some areas are illogical and perilous.

Nature elements can grow or shift strangely, often reflecting the flow of the games.

1. Death and Survival: Everything revolves around staying alive.

2. Logic and Intelligence: Players must think analytically and make quick decisions.

3. Human Nature: Fear, trust, betrayal, and cooperation are tested.

4. Reality Perception: Time, space, and physics are unpredictable.

5. Mystical Atmosphere: Borderland feels like a parallel universe — both terrifying and captivating.

The Beach is one of the most interesting and mysterious locations in Borderland.

Physically, it’s a vast beach complex surrounded by artificial structures.

It is usually sunny, warm, and colorful, creating a stark contrast to Borderland’s dark and dangerous areas.

The area feels like a utopia or safe haven, where players can experience a temporary sense of safety and comfort.

Residents generally follow rules and maintain the order of this “safe zone.”

Players often form temporary alliances and develop social relationships here.

However, the Beach is still part of the game, so danger is never fully absent.

The Beach acts as a "safe haven" within Borderland, yet it can also be deceptive.

Bright colors, music, and comfort can distract players, making them less vigilant.

Social tests and trust games are especially prominent here; players must determine who is friend or foe.