- "Don't you dare look down on us that are there still struggling to survive!"
—Ryōhei in Chapter 26
Arisu is shown to have a bluish black/darkish blue/black hair and light neon violet/blue colored eyes. He has a pale colered skin and is seen wearing his high school uniform (a white long sleeved shirt with a red t-shirt inside and a blue colored pants with light soil colored belt with a pale aquamarine sneakers)
A 3rd year high school student with the hidden potential to be one hell of an analyzer, he looks at things from afar and checks every details he can find, he keeps track of everything in the he learns so that he can find a way to put an end to this twisted game. Though he still has a long way to go, he further develops his abilities in Borderland, a place where games and human lives are nothing different.
He is often compared to his younger brother by his father, resulting for his lack of self confidence and pent up frustration. He would often daydream and wish that he and his friends would be able to go far away from reality, from his overly demanding father and stuck up younger brother but even so he's able to enjoy life and forget all of his worries when he's with his two best friends, Chota and Karube, both of which are with him in Borderland.
Every time he loses his sanity to the game, he always thinks of his friends, their sacrifices and his promise to them.
Before Borderland Edit
Arisu came from a prestigious family. His father is a superintendent in the education department.Alice lost her mother as a child. Not understanding, he asked to his father during the cremation why they can't see her anymore. His father reprimanded him, saying that he did not like stupid people and that if he wanted his affection he had to become the child he wanted him to be.When Arisu was in 5th grade, he was in the same class that Karube. After while he was being beat up by another child, Karube arrived to help him but the children ran away when he saw him. When Karube asked if he was all right he answered that he saw a huge mole on the neck of the children and a weird hair growing out of it while he was beating him up. The next day they went around spreading the word and even followed the children at the way home until he finally broke down and surrendered.
His father would often meddle with Arisu's life and keeps on comparing him to his competent younger brother. Some times when his father was again complimented him, Arisu felt like he didn't even exist.
When Arisu arrived at High School, he was in the same class that Chota. His first impression on him was that he was idiotic and hopeless and he didn't want to become friend with him. When Arisu began practicing guitar due to his well-intended teacher's influence, his father moved him away from Arisu's school in order to cease Arisu's newfound hobby. Full of anger, Arisu threw a rock on one of the glass of his house. He immediately regretted because he'll be compared to his brother but Chota arrived and simply said that he can tell his father he threw it and ran away. The next day he gave a piece of bread to Chota to thank him and asked why he did this. Chota simply answered that he looked really sad and he'll do it again if he'll gave him some bread. Arisu realized that he was idiotic and hopeless but he was also the kindest person in the world. From this day they became close friends.
Arisu's younger brother at most of the time belittled him and showed little respect to his older brother. He placed 10th in a national mock exam and strive to showed off and beat his older brother in both academics and sports.
One day he and Chota was taken of their money and beaten up by gangsters, Karube arrived and asked if he remember him. Then he beat up the gangsters. After that he became close friends with the two. Even though they are minor (age of adulthood in Japan is 20), they would often hang out at his bar and drink.
In final years of last school, after failing an exam he went to Karube's bar to avoid to be compared again to his brother by his father. When Karube warned him that wasn't a good solution, Arisu wished that to win at the lottery or that a disaster happened to the city so he could be more responsible. Chota proposed them to go to Shibuya to party. When Arisu told him that at this hour they aren't any train, he simply said that they'll walk. After a long walk, they decided to wait for the first train to go home because they were too much tired. While they were waiting, they saw fireworks witch surprised them because it's 4 AM. When suddenly a big one exploded and dazzled them.
Borderland: First stage Edit
The three woke up in Karube's bar all covered of dust. They went outside and saw that their nobody anymore. While Karube was worried about what happened, Arisu and Chota were excited because they felt that they were free and thought that's a dream and start to have fun. After a long time, Arisu and Chota asked how a dream could last so long. Karube told them that it's time to take this situation seriously and that this world is real. Suddenly they hear some music and discovered a temple full of food. Arisu and Chota run in and started to eat while Karube warned them that something is wrong. A woman came out of the toilet in the temple, when Chota asked if she want to play with them she asked if it's there first time and if they penetrate in the temple without knowing anything. When Karube proposed them to get out of here, she warned them that now they're in they can't go out and they must stop thinking it's a dream or they'll die. They discovered that all the entrance were blocked by lasers a screen appears written on it: "Game" and an image of a card:" Three of Clubs "
The girl presented herself as Saori Shibuki. After the explanation of the rules, Arisu asked the meaning of all this but Saori answered that its not the time to ask questions. Karube draw a paper fortune in first and obtain a "Best luck". Then it's Chota draw one and obtained "Little luck" and an equation to resolve. Arisu tried to help him. Chota answered wrong and nearly escaped of the fire arrows thrown on him. Its Chibuki who draw the next paper fortune and obtained "Misfortune". While her and Karube were trying to find the answer, Arisu realized that he was selfish to desire to leave his old life and want to go back. Karube and Shibuki answered to the questions but get it wrong. When the arrow started to be shooting, Arisu's legs refused to move, Karube kicked in his legs and yelled that he can do it because he's his friends. Arisu's legs finally moved and he was able to put himself in a shelter. But Chota didn't make it in time and received an arrow in the leg. Karube arrived and protected him with a table. Impressed and determined, Arisu went to draw the last paper fortune wishing to be "Great Luck" but fall in despair when he saw that it was "Terrible Luck". But to Arisu surprised, Karube decided to he'll gave the answer and he entrusted his life to his judgment. While he was thinking about the answer he asked to himself why used paper fortune to ask the answered. Then he suddenly understood the purpose of this game and answered to the question. But to the surprised of the others, he answered wrong. He explained to the others that there was no way they could've solved this problem and that he understood that the utility of the paper fortune is to indicate where is to arrows will be thrown or where is the safe point with Karube's fortune (south). The four ran in this direction. They found a hidden shelter and get into it in time. A message announced them that they've won the game. After a short celebration and they discovered that a sort of register print of each a them a 3 of clubs card and a paper called "visa". The four went to the hospital to heal Chota's wound. Shibuki explained on the way what she knows about this country: The Borderlands.
She explained them that a lot of people like us are there: the players. Every games start at nightfall and may take place everywhere (bank, school...). But before she could say more they arrived at the hospital. While Saori was healing Chota's wound and Karube searching for food, Arisu waited on the top of the roof when he met another player. The player told him that all his friends are dead and even if he survives there will be always another game. Because of that he is fed up of these games so today is his last day because he quit the game. Arisu asked him what does he mean by there will be always an other game. The player replied that he visa ends today witch means it's the end before being hit by a laser on the head coming from the sky. Arisu understood that because of the game which had a difficulty level of 3, in 3 days there visa expires. So they must continue to participate to these games if they want to live.
The next day, the four went for fishing and had a lot of fun, during this moment Arisu realised that even if he is in a awful place for the first time of his life he is glad to be alive and doesn't fell alone. After diner, Karube proposed that tonight they participate to another game. It is finally deceided that Chota wont participat to a game to heal his wound and Shibuki will stay with him. Arisu and Karube went into the area of a game the "Five of Spades".
They sympathized with another player Nitobe who explained them what means the value of the card and the suit. After the explanation of the rules the three stayed group and waited to see "it". After a moment, they heard strange noise upstair. They went to see what was going on and they saw "it": the Horse Head with a machine gun. The three ran away as fast as they can. While they were going on the floor below, Arisu understood that they won't make it if they keep runing downstairs so he and Karube stayed on the floor below while Nitobe kept going downstair. Like Arisu thought: "it" went downstairs and killed Nitobe before he could reached the central staircase.
After that, he and Karube started to look for the safe zone but they founded "it" and were separated. Karube ran away and Arisu hided while "it" passed next to him. After that, he rested a bit and started to think of what "it" would do to win this game. He understood that "it" was prepared that players could try to chase him and would carry multiple guns. After that, he realized that "it" tried to make sure that no players stayed on the 4th floor by shooting on them even if they are to fare away to be hit which means that the safe zone is on the fourth hallway.
Only one minute remains when he arrived on the fourth hallway. "it" was waiting there but Karube knocked him down from behind. Arisu took advantage of it and started to look for the safe zone and finaly found it, but when he entered in he found that two buttons must be touched at the same time to clear the game. He yelled for help and Usagi came in the safe room. They both pressed the buttons in time and clear the game with make "it" head exploded. Arisu proposed to Usagi to come with them but Usagi and warns him that some game would require betrayal between players. Finally he and Karube who has been injured left and founded Shibuki and Chota.