Jay, he's your brother.

Driving skills:
• Driving skills: Yes, professionally drives any type of transport.
• Experience: Completed full military training in the USA, knows how to operate equipment in extreme conditions and evade pursuit.
• Vehicle Types: From classic American muscle cars to heavy military armored vehicles (Humvee) and government limousines.
Online shopping:
Ordering goods from civilian online stores (Amazon, eBay, etc.) is technically impossible and blocked for cybersecurity reasons. Instead, a special secure supply app is installed on the smartphone, through which Jay can instantly request delivery of any military equipment or weapons from Pentagon warehouses.
Phone limitations:
Downloading commercial games and watching entertainment videos (YouTube, TikTok) is not possible on the device. The smartphone is under strict Pentagon cybersecurity control; all entertainment services are blocked, and the screen is used only for viewing tactical maps, documents, and classified video reports from military bases.
Using the phone:
• Time per day: About 1–2 hours, strictly business related.
• Purpose: Reading classified army reports and emergency communications with the Pentagon. Doesn't waste time on social media, entertainment, or games, preferring strict military discipline and real-world training.
Mobile phone:
The specific commercial brand is not named in the manga. According to the plot, as Commander-in-Chief of the US Armed Forces, Jay uses a specialized, highly classified government smartphone with military-grade cryptographic protection for emergency and secure communications with the Pentagon and the White House.
Place of residence in adulthood:
• Country and city: USA, Washington (District of Columbia).
• Area/Residence: Closed and highly guarded government residence and military headquarters (Pentagon). Resides there in accordance with his status as Commander-in-Chief of the United States Armed Forces.

Diet and nutrition:
• Food Amount: About 3.5 – 4.5 kg of food per day (about 5000 kcal) to maintain a weight of 95 kg during extreme training.
• Diet: 5-6 times a day (3 huge main meals and 2-3 dense protein snacks).
• Diet base: Huge portions of meat (steaks, chicken), eggs and massive bowls of rice to replenish energy.
Experience and length of service:
• Boxing experience: More than 10 years of combat practice (trained in the ring from early childhood under the guidance of his champion father).
• Fighting experience in Otokojuku: 3 years of participation in the school’s death tournaments.
• Military Experience (Adulthood): Approximately 20-25 years of distinguished service in the United States Armed Forces (went from Annapolis Academy cadet to four-star General and Commander-in-Chief).
Income and salary (as an adult):
• Position: Commander in Chief of the United States Armed Forces (highest rank O-10).
• Salary: About $18,500 per month (more than$220,000 per year) is the maximum base salary according to the US military pay scale.
• Support: Fully funded by the Pentagon (free luxury housing, armored transport, personal security and full medical care).
Names and addresses:
• Main abbreviation: Jay (J) - this is what absolutely all his friends, teammates and teachers call him.
• Formal address (as an adult): General Jay or Sir - by subordinates and US military personnel.
• Nickname: American - Used at Otokojuku High as a reference to his origins.
Attitude towards EVs (Unmanned Electric Vehicles):
• In the army: Has a very positive attitude. Values ​​military unmanned platforms for their stealth (noiselessness, no heat signature) and ability to save the lives of personnel during frontline logistics.
• Personal attitude: Doesn't trust civilian autopilots. Like an old-school warrior, he prefers strict manual control over technology and, in everyday life, gets behind the wheel himself rather than relying on artificial intelligence.
Driving skills

Character: J / King Battler Jr.
Franchise: Sakigake!! Otokojuku (魁!!男塾)

Appearance and parameters:
• Height: 195 cm
• Weight: 95 kg
• Age: Teenager in his first year (around 15-16 years old) / Mature man in the sequels 33 years in the future or 40 years old
• Skin color: Light (white)
• Eye color: Blue
• Hair color: Light (blond, flat top haircut)

Character:
• Honor and respect - values ​​fair fighting and despises dirty tricks.
• Unwavering Loyalty - A devoted friend who is willing to sacrifice himself for his comrades.
• Patriotism and pride – proud of his homeland and boxing heritage.
• Cold-blooded and hot-tempered - usually behaves in a collected manner, but instantly “boils over” and falls into a rage if the enemy acts meanly or insults loved ones.
• Sense of responsibility – has a developed sense of duty, is ready to personally answer for the mistakes of subordinates.
Jay's Childhood:
He grew up a kind and determined child in the family of legendary boxer King Butler. He was raised in an atmosphere of rigorous athletic training and military discipline. At the age of 13, he experienced the tragic death of his father, which forced him to mature early and gave him a powerful incentive to prove his family's strength in the ring.
Clothes in childhood:
As a child, Jay most often wore workout clothes: athletic shorts, light T-shirts, and high-top boxing shoes. Leather boxing gloves and protective hand wraps, wrapped around his hands for training with his father, were a key element of his look from an early age.
Diet and nutrition:
• Food Amount: About 3.5 – 4.5 kg of food per day (about 5000 kcal) to maintain a weight of 95 kg during extreme training.
• Diet: 5-6 times a day (3 huge main meals and 2-3 dense protein snacks).
• Diet base: Huge portions of meat (steaks, chicken), eggs and massive bowls of rice to replenish energy.
Experience and length of service:
• Boxing experience: More than 10 years of combat practice (trained in the ring from early childhood under the guidance of his champion father).
• Fighting experience in Otokojuku: