Yasoturu Sado

Ichigo Kurosaki is Sado's best friend, a brother in spirit. They share a vow of mutual protection. Ichigo is the first to stand up for Sado when he couldn't protect himself.
Oscar Joaquin de la Rosa (Abuelo) is Sado's grandfather, moral guide, and source of ideology. His soul resides in his right hand.
Orihime Inoue is a close friend who fought together in Soul Society and Hueco Mundo.
Uryuu Ishida is a fellow battler who fought together through Hueco Mundo.
Renji Abarai - Trained Sado in Hueco Mundo
Yoruichi Shihoin trained Sado and taught him how to activate full-dimensionality at will.
Kukaku Shiba taught the basics of spiritual energy management
Gantenbainne Mosqueda - an opponent in Hueco Mundo, in a fight with whom Sado awakened his true power; he spared him

Substitute Shinigami Arc:
Sado first encounters the spirit world while rescuing a parrot with the soul of a boy, Yuichi Shibata. Gradually, he begins to see Hollows and spirits.
Soul Society Arc:
Along with Ichigo, Orihime, and Uryuu, he sets out to rescue Rukia. He trains under Kukaku Shiba in spiritual energy manipulation. He battles Shinigami and demonstrates his power. He is defeated by Kyōraku Shunsui (captain of the 8th Division).
Arrancar/Hueco Moon Arc before:
Trains with Renji Abarai in Hueco Mundo. In a fight with Gantenbainne Mosqueda, he realizes the nature of his power (akin to Hollows), awakens the true form of his right arm and the devil's left arm. He loses to Nnoitra Hilger (5th Espada)—his shield was tested.
Fullbring Arc (Lost Agent Arc):
Chad joins Xcution, a group of fullbringers. He helps restore Ichigo's powers. It turns out his powers are full subjugation, the object being his own skin. He battles Syukuro Tsukishima, able to surprise Ichigo and block his attack.
The Thousand-Year Blood War Arc:
Sado trains in Hueco Mundo. His strength level is at least multi-continental (capable of harming Ichigo with a full-bringing). In the epilogue, he becomes a professional boxer.

Right Hand — Brazo Derecha de Gigante (Right Hand of the Giant)
First Form (Early): The right arm becomes coated in a liquid up to the shoulder, hardening into armor. The arm is black with a dark purple stripe outlined by a white line. The shoulder flares upward. Significantly increases the power of punches.
Allows you to block attacks and explosions
The ability to release energy blasts from one's fist
True Form (awakened in Hueco Mundo): A more intricate design, the purple becomes lighter, and the white disappears. The shoulder becomes pointed and longer. A black shield with a red pattern and a grinning face appears on the arm—a shield of defense. This is the defensive arm.
It is inhabited by the soul of Oscar Joaquin de la Rosa, the grandfather who taught him to protect.
Right hand techniques:
El Directo ("Direction" / "One Giant Punch"): A powerful energy blast from the fist. Initially, it could only use two charges, but after training with Yoruichi, it can be used multiple times.
Grua Tirar (Crane Lift): A shoulder throw reminiscent of the seoi-nage of judo, allowing one to throw away a giant-sized opponent
Protective Shield: Blocks energy and physical attacks
Left Hand — Brazo Izquierda del Diablo (The Devil's Left Hand)
Awakened during a battle with Gantenbainne Mosqueda in Hueco Mundo. Unlike the right (defensive) arm, this is the offensive arm. The arm turns white with a red stripe running its entire length; a long horn appears on the shoulder.
La Muerte ("Death" / "One Demon Strike"): Sado's most powerful technique. Sado concentrates spiritual pressure in his fingers, clenches his fist, and delivers a crushing blow to the opponent's vital point. A wave of reiatsu passes through the body and extends behind the opponent—if there is an obstacle behind them, a demonic face is imprinted on it.
With one blow, La Muerte broke through the wall of Las Noches (a huge fortress in Hueco Mundo)
Defeated Gantenbainne Mosqueda (Privaron Espada) with one blow. Fighting strategy: defend with the right, attack with the left.

Nature of Powers - Fullbring (Full Submission)
Sado's powers are called Fullbring (Full Subjugation), an ability of people whose mothers were exposed to Hollow Reiatsu before birth. The object of Sado's Fullbring is his own skin.
Sado realizes that his power is more akin to that of a Hollow than that of a Shinigami or Quincy. In Hueco Mundo (the world of Hollows), his power felt "at home" and increased significantly.

The source of his full-size figure is the pride his grandfather instilled in his heart; the object is the skin on his hands.

Powers and abilities
Physical abilities (without full-dimensionality)
Superhuman Strength: lifted a steel beam that had fallen on him; threw a man half a block with one hand; broke a telephone pole and swung it like a bat; harmed Hollows with his bare fists
Superhuman Durability: Withstood a falling steel beam (it buckled from contact with his back); survived a head-on collision with a motorcycle without serious injury; withstood an attack from a Hollow's claws that would be fatal to a normal human.
Enhanced Speed: Faster than a normal human; increased to a level comparable to the Arrancar's Sonido as the story progressed.
Expert hand-to-hand combatant: never formally trained, but an exceptionally capable fighter, even when outnumbered
High Spiritual Power: Powerful spiritual pressure (reiatsu) that has deceived even Shinigami; usually used to strengthen attacks
Spiritual Perception: After meeting the spirit of Yuichi Shibata, he began to sense the approximate locations of spirits and Hollows, but could not see them.
After saving Karin from the Hollow, Kurosaki began to fully see spirits.

Sado returned to Japan and enrolled in a school in Karakura Town. In eighth grade, he helped Ichigo when he was attacked by bullies. Later, Chad was attacked himself, but, true to his vow, he did not defend himself. Ichigo intervened, learned of Sado's past and his promises. They made a pact: to protect each other and fight side by side.

From childhood, Sado was a physically strong and aggressive boy—he bullied and beat other children, abusing his superiority. After the death of his parents (when he was about 8 years old), he was adopted by Oscar Joaquin de la Rosa, whom Sado called "Abuelo" (Spanish for "grandfather"). Abuelo was also incredibly strong, but he never used force to intimidate. His ideology resembled the principles of the Sermon on the Mount: "Whoever strikes you on the right cheek, turn to him the left also." Local criminals took advantage of this, attacking the old man, but he did not resist. One day, the fathers of the children Sado fought with decided to punish him. Oscar Joaquin intervened and, without resisting, took the beating himself. This left a profound impression on Sado—he was forever changed and resolved to use his strength only for defense.
Commemorative coin:
Grandfather gave Sado a coin—a valuable relic, a symbol of their pact and values. This coin became a symbol of Chad's connection to his grandfather and his legacy. Later, when bullies threatened to destroy the coin, Ichigo came to the rescue and protected it.

Sado is extremely taciturn—he's either silent or speaks in two or three short sentences. He's not given to long monologues or emotional outbursts. He dislikes fighting. Despite his immense strength, he only uses it to protect his loved ones. He doesn't attack first, doesn't provoke, and doesn't seek revenge. If he hits someone, it means someone has endangered his friends. He's devoted to his friends. He's willing to sacrifice himself for Ichigo and the others. Friendship is sacred to him. He and Ichigo practically swore an oath to protect each other and fight shoulder to shoulder.
Intelligence and calm. Behind the image of a silent brute lies a smart man (ranked 10th in school). He acts rationally and doesn't panic.
Code of Honor. Lives by the principle instilled in him by his grandfather: use force only for defense, never to attack or intimidate. This is a deeply ingrained moral principle, not just a rule.
Pain Tolerance. Resilient not only physically but also mentally—able to withstand powerful psychological attacks and continue fighting.

Dark skin color (Japanese-Mexican mixed race)
Tall, muscular, massive build
Brown wavy hair
Brown eyes
Pronounced cheekbones
On his left shoulder is a tattoo: a heart entwined with a snake with angel wings, with the inscription "Amore e Morte" (Italian for "Love and Death")
He usually wears clothes that highlight his size: shirts, t-shirts, and often Mexican-inspired clothing.

Full name: Yasutora Sado (Japanese: 茶渡泰虎, romanized: Sado Yasutora)
Nickname: Chad (Japanese: ちゃど, Chado) - Ichigo misread the first character of his family name (茶 - "sa" or "cha/cha"), and it read "Chad" instead of "Sado"
Age: 15–17 years old (main plot), adult in the epilogue
Date of birth: April 7
Height: 197–198 cm
Weight: 112–118 kg
Race: Human, Fullbringer (Soulbinder)
Origin: Half Japanese, half Mexican. Born in Okinawa, Japan; sent to Mexico by his parents as a young child.
Place of residence: Karakura City, Japan
School: Karakura High School, 10th best student (out of 50)
Profession in the epilogue: professional boxer, competes in the WBO heavyweight division