Jay, he's your brother.

Maximum weight (Strength):
• Normal weight lifting: From 300 to 500 kg of basic physical strength (at the level of the strongest strongmen on the planet).
• In the Heat of Battle (Peak): Capable of lifting, throwing, and flipping objects weighing 1–2 tons.
• Impact Power (Main Power): Through his signature supersonic Mach Punch, the momentum of his fist generates colossal kinetic energy, creating a striking force of tens of tons, capable of crushing steel and granite.

Communication / Speech:
• Quiet and reserved: Jay is a classic "action man." He rarely engages in small talk, and doesn't panic or shout like most students.
• Laconic: Prefers to keep a cool head, speaks strictly to the point and very convincingly.
• Speech peculiarity: In moments of pathos or before a crushing blow, he likes to briefly and menacingly make ironic remarks about the enemy, often using short English phrases.
What Jay is doing in Otokojuku:
• Trains to the limit: He undergoes extreme military and physical training every day, hardening his body and spirit according to the school’s strict rules.
• Fights for the school's honor: Acts as one of the strongest fighters in the first year, defending Otokojuku in death tournaments against martial artists.
• Learns the Japanese Spirit: As an American, he gains a deep understanding of Japanese traditions and the samurai code of honor, becoming a loyal sworn brother to his comrades.
• Keeps a Cool Head: Serves as the "voice of reason" during freshman year, keeping hot-tempered classmates in check during dangerous situations.
How many minutes does Jay brush his teeth?
• By American Standards: As a former cadet at the elite US Naval Academy, Jay is accustomed to impeccable discipline and hygiene. He brushes his teeth strictly according to medical standards—exactly 2-3 minutes, carefully working through each section, as if on a timer.
• In the harsh school environment: In Otokojuku, first-year students are often given mere seconds to get ready and perform their morning hygiene routine, while the upperclassmen scream. With his phenomenal hand speed and signature Mach Punch (which exceeds the speed of sound), Jay is able to thoroughly brush his teeth in just a few seconds, performing hundreds of sweeping strokes in the blink of an eye!

Character's clothes and shoes:
• Casual/Combat Style: Brown or green vest over bare skin, loose dark pants with a massive red or yellow belt. During serious fights, fights topless.
• Shoes: Heavy black combat boots or boxing shoes.
• Main accessory: Signature magnum steel knuckle dusters on both hands.
• School uniform: Black Japanese gakuran uniform (long closed jacket and wide pants).
How much does Jay eat per day:
• The exact serving sizes are not given in figures, but as a heavyweight boxer (195 cm, 95 kg), he has a huge appetite. To maintain his shape, he requires at least 4000-5000 kcal per day.
• Favorite food: Loves American cuisine – huge beef steaks and hamburgers.
• At school: Eats like crazy along with all the other Otokojuku students, steadfastly enduring both the huge amounts of food during training and the periods of severe starvation during punishments.
What Jay is doing in Otokojuku:
• Trains to the limit: He undergoes extreme military and physical training every day, hardening his body and spirit according to the school’s strict rules.
• Fights for the school's honor: Acts as one of the strongest first-year fighters, defending Otokojuku in death tournaments against martial artists.
• Learns the Japanese Spirit: As an American, he gains a deep understanding of Japanese traditions and the samurai code of honor, becoming a loyal sworn brother to his comrades.
• Keeps a Cool Head: Serves as the "voice of reason" during freshman year, keeping hot-tempered classmates in check during dangerous situations.
What Jay is doing in Otokojuku:
• Trains to the limit: He undergoes extreme military and physical training every day, hardening his body and spirit according to the school’s strict rules.
• Fights for the school's honor: Acts as one of the strongest fighters in the first year, defending Otokojuku in death tournaments against martial artists.
• Explores the Japanese Spirit: As an American, he gains a deep understanding of Japanese traditions and the samurai code of honor, becoming loyal

Character: Jay (J) / King Butler Jr.
Anime/Manga: "Sakigake!! Otokojuku" (Command!! Boys' High School)

Basic information:
• A former exchange student from the United States Naval Academy who became a loyal disciple of Otokojuku. Son of legendary boxer King Butler.
• Fighting style: A highly skilled professional boxer with immense physical strength. He fights with special steel knuckles ("magnum steel"). His signature move is a punch that can break the sound barrier (Mach Punch).

Appearance and first impression:
• Has an extremely brutal, menacing and stern appearance in the style of 1980s action films.
• Due to his massive build, heavy gaze and sharp facial features, he looks like a stern, dangerous and even evil opponent.

True character:
• Noble Warrior: Despite his intimidating appearance, Jay is not evil. He strictly adheres to a code of honor and the rules of a gentleman. He absolutely despises meanness, dirty tricks, and backstabbing.
• Merciless in combat: In the ring or battlefield, he becomes extremely strict, tough, and strikes to kill, demanding maximum effort from his enemies. At the same time, he will never finish off a defenseless person.
• Loyal Friend: Possesses iron loyalty. Starting out as a rival to the main characters, he quickly became a trusted comrade, willing to risk his life for the boys of Otokojuku without hesitation.
• Cool Stoic: Stands out among the hot-tempered Japanese students with his calmness, clear-headedness in dangerous situations, and easy sense of humor, often inserting English phrases into his speech.
Character Name: Jay (J) / King Butler Jr.
Anime/Manga: “Sakigake!! Otokojuku"

Physical data:
• Age: 15–16 years old (at the time of entering Otokojuku)
• Height: 195 cm
• Weight: 95 kg
• Skin color: Light (Caucasian race)
• Hair color: Blonde (light)
• Eye color: Blue (anime) / Brown (manga)