Sk8 Infinity

Age: adult; the series does not clearly establish an official numerical age.
Birthday: November 22nd.
Appearance: Tall and thin, with black hair with purplish undertones, green eyes, and a mole under his right eye. He usually wears a suit.
Personality: reserved, professional, extremely calm and obedient. It is much more difficult to read his emotions than those of others.
Skills: In addition to knowing how to skate, he has experience organizing and controlling the operations behind “S”.
Job: Ainosuke's secretary.
Relations:
Adam/Ainosuke: This is his most important relationship. He has known Ainosuke since he was a child and was originally the one who taught him to skate.
Shindo Family: He has worked for them since he was a child.
“S”: controls much of the organization behind the scenes.

Age: 26 years.
Birthday: May 1st.
Appearance: Tall, with dark blue hair, red eyes, and an extremely elegant appearance. As Adam, he uses a mask and extravagant attire.
Personality: Extremely charismatic, intelligent, dominant, and obsessed with skateboarding. His personality as "Adam" is much more extreme than Ainosuke's.
Position: Founder of “S” and one of its legendary skaters.
Public life: young and popular politician.
Skills: Considered one of the most extraordinary skaters in the series. His style is aggressive, unpredictable, and he uses unique moves that intimidate his rivals.
Relations:
Tadashi: his secretary and the person who was by his side since childhood.
Cherry and Joe: former friends/rivals.
Langa: becomes one of its main rivals.
Reki: has an indirect relationship due to Langa.

Age: 26 years.
Birthday: July 7th.
Appearance: very tall, muscular, dark green hair and red eyes.
Personality: extroverted, relaxed, playful, and quite flirtatious. However, beneath that attitude, he has a very protective and responsible side.
Skills: One of the physically strongest skaters on "S". His style makes excellent use of his strength and power.
Job: Owner and chef of an Italian restaurant called Sia la luce.
Relations:
Cherry: childhood friend and rival. They've known each other since kindergarten.
Reki: functions almost like an older brother figure.
Langa: also advises it and recognizes its potential.
Shadow: companion within “S”.
Adam: former friend/rival.

Age: 26 years.
Birthday: March 27.
Appearance: Tall, with long pink hair, golden eyes, and glasses. His aesthetic combines traditional Japanese elements with modern technology.
Personality: intellectual, elegant, calculating, and quite serious. With strangers, he can be polite and calm; with his friends, especially Joe, he quickly loses his temper.
Skills: One of the best skaters in "S". He uses Carla, an AI integrated into his skateboard, to analyze data and calculate his movements.
Job: Famous calligrapher specializing in artificial intelligence.
Relations:
Joe: his best friend since childhood and his eternal rival. They constantly insult each other, but there is enormous trust between them.
Adam: They have a complicated history that goes back to their youth.
Reki and Langa: she ends up helping them when they need advice.
Carla: your AI and technological companion.

Age: Approximately 24 years old.
Birthday: September 14th.
Appearance: Tall adult with dark hair and an intimidating appearance. Like Shadow, he uses striking makeup, dark clothing, and a rather aggressive aesthetic.
Personality:
Like Shadow: loud, theatrical, aggressive, and willing to use dirty tricks to win.
Like Hiromi: shy, kind, sensitive, and hardworking.
Job: florist.
Skills: good skater, especially in races where he can take advantage of obstacles and unconventional strategies.
Relations:
Reki: develop a friendly relationship with him.
Miya: has some pretty comical interactions.
Love Interest: He is in love with Aiko, a city hall employee.
Joe/Cherry: regular companions inside “S”.

Age: Age not confirmed.
Birthday: February 22nd.
Course: first year of basic secondary school.
Appearance: Small, thin, with black hair tinged with blue and green eyes. Its aesthetic is closely related to cats.
Personality: Intelligent, sarcastic, competitive, and quite boastful at first. He has a "I'm better than you" attitude, but underneath that lies some insecurity.
Skills: Skateboarding prodigy. Performs extremely difficult technical tricks with ease and has impressive coordination.
Objective: to reach the level necessary to represent Japan in international competitions.
Relations:
Reki and Langa: ends up integrating into their group.
Shadow: He has a rather amusing relationship with him.
His former friends: his experience of being ostracized for surpassing others greatly influences his personality.

Age: around 17 years old.
Birthday: February 8th.
Course: second year of upper secondary school.
Appearance: Tall, thin, with dark blue hair and blue eyes. He has a rather calm and relaxed demeanor.
Personality: reserved, absent-minded, quiet, and somewhat introverted. He may seem to be in his own world, although he is also quite stubborn when he sets his mind to something.
Skills: He's been snowboarding since he was little, which allows him to transfer snowboarding techniques to skateboarding. He has an extraordinary natural talent for adapting to the terrain and learning moves.
Skate style: It takes advantage of movements typical of snowboarding and develops a very unconventional way of skating.
Relations:
Reki: his best friend and the one who teaches him to skate.
Miya: partner and occasional rival.
Adam: his most important rival for a good part of history.
Nanako: her mother.

Age: 17 years.
Birthday: August 8th.
Course: second year of upper secondary school.
Appearance: messy red/orange hair, amber eyes, slightly tanned skin, and a distinctly skater style of clothing.
Personality: Cheerful, energetic, expressive, creative, and very passionate. Can be impulsive and tend to compare themselves too much to others, especially when they feel inadequate.
Skills: Excellent knowledge of skateboarding, board making and modification, mechanics, and design. His greatest strength isn't just skating: he understands how boards work and how to adapt them to the skater.
Relations:
Langa: his best friend and the person he introduces to skateboarding.
Miya: starts with a rather competitive relationship, but ends up becoming part of their group.
Joe and Cherry: she considers them role models and receives advice from them.
Shadow: also develops a friendship with him.

Reki Kyan 🛹 — The protagonist. Cheerful, creative, and passionate about building and modifying boards. He's the one who introduces Langa to "S".
Langa Hasegawa ❄️ — Reki's best friend. His snowboarding background has given him a pretty impressive natural talent for skateboarding.
Miya Chinen 🐱 — A young skateboarding prodigy. He has a rather sarcastic and competitive personality.
Hiromi Higa / Shadow 🌹 — By day she works at a flower shop, and by night she participates in “S”. She is much kinder than her appearance suggests.
Kaoru Sakurayashiki / Cherry Blossom 🌸 — An extremely technical and elegant skater. He uses a board equipped with advanced technology.
Kojiro Nanjo / Joe 🔥 — Cherry's best friend/rival. He's a very aggressive skater with enormous physical strength.
Ainosuke Shindo / ADAM 👑 — One of the most important characters and Langa's main rival. He is a powerful figure within "S".
Tadashi Kikuchi — Ainosuke's right-hand man and confidant.

Reki Kyan, a high school student passionate about skateboarding. Reki is obsessed with "S," an underground race held in an abandoned mine where participants compete in extreme downhill runs and duels called "beefs."

One day he meets Langa Hasegawa, a transfer student who has just returned from Canada. Langa has never skateboarded, but he has experience snowboarding, so Reki ends up introducing him to the world of "S".