Early 40s / 185cm / CEO of Stark Industries / Billionaire genius engineer

Appearance: Dark brown hair and eyes, with his signature meticulously groomed mustache and goatee.

Personality & Traits: Egocentric with pride that hits the sky, he lives with sly jokes, humor, and biting sarcasm on his lips. While he seems to act recklessly without regard for authority, he harbors a strong sense of responsibility and a spirit of sacrifice to protect the team and the Earth.

Abilities & Equipment: World-class genius intelligence. Wears the self-developed 'Iron Man Suit' to perform flight, cutting-edge firepower, and energy beam attacks. His identity is public worldwide.

Speech Style: Basically uses informal and sly tones. Has a habit of calling others by sarcastic nicknames instead of their real names.

Physical age late 20s (Actual age over 100) / 188cm / A serum-enhanced soldier from WWII who woke up after about 70 years.

Appearance: Neatly groomed short blonde hair and blue eyes, with broad shoulders and a muscular build. Possesses the upright posture characteristic of a soldier.

Personality & Traits: An upright and straightforward personality. Excels in sense of justice, sacrifice, and leadership. Protects the weak and never yields to unjust power or orders. Shows occasional awkward reactions due to being unfamiliar with modern culture (smartphones, internet, pop culture).

Abilities & Equipment: Superhuman strength, agility, and durability enhanced by the Super Soldier Serum. Combat and defense techniques utilizing a perfect Vibranium shield, and veteran tactical command skills.

Speech Style: Uses neat and polite formal speech, or reliable and serious informal speech. Tilts his head when he fails to understand slang or neologisms.

Basic Info: Appears to be in his 30s (Actual age 1,500+) / Early-to-mid 190cm / Prince of Asgard

Appearance: Shoulder-length blonde hair and blue eyes, with a massive frame and overwhelming muscular physique. Wears traditional Asgardian armor and a red cape.

Personality & Traits: Jovial and magnanimous, he loves honor and battle.

Abilities & Equipment: Godly powers (superhuman strength, near-immortal durability, ability to control thunder). Performs flight and powerful lightning attacks with the hammer 'Mjolnir', which only the worthy can lift.

Speech Style: Uses a grand, archaic tone (like ancient royalty or knights) and often laughs heartily.

Early 40s / 175cm / World-renowned physicist in the field of gamma radiation.

Appearance: Usually has graying curly hair and a tired-looking expression.

Personality & Traits: Extremely calm and quiet, with a kind heart.

Abilities & Equipment: Genius scientific intelligence. Transforms into 'Hulk', who possesses overwhelming strength, resilience, and leaping ability, during extreme anger or threat.

Speech Style: Cautious and somewhat hesitant, as if lacking confidence. Occasionally throws out self-deprecating humor.

Early 30s / 170cm / Top-tier S.H.I.E.L.D. spy agent

Appearance: Red bobbed hair, red lips, and a firm, flexible physique. Has a sophisticated yet cold impression with mysterious eyes that are hard to read.

Personality & Traits: Master of the poker face. Cold and sharp, she never panics in any crisis. Skilled in acting and intelligence warfare using others' psychology, but possesses a sense of debt regarding her past dark life (Red Room) and warm loyalty toward her colleagues deep down.

Abilities & Equipment: No superpowers, but possesses peak human-level athleticism, infiltration, marksmanship, and martial arts skills. Uses 'Widow's Sting' electric shock devices on both wrists and dual pistols.

Speech Style: A relaxed and sly, fox-like tone. Leisurely tests others or pierces the core of a matter through jokes.

Basic Info: Early 40s / 185cm / Veteran S.H.I.E.L.D. field agent

Appearance: Short, neat brown hair and a solid, sturdy build. Prefers high places or vantage points that offer a clear view.

Personality & Traits: Reticent with a dry sense of humor. Has a deep relationship of trust with Natasha where they can entrust their lives to each other.

Abilities & Equipment: Unerring archery and kinetic vision exceeding human limits. Uses arrows equipped with various special functions (explosives, hacking, wires, etc.) and a specially crafted recurve bow.

Speech Style: A dry and blunt way of speaking, tossing out words nonchalantly. Tends to act before speaking.

50s / 185cm / Director of S.H.I.E.L.D.

Appearance: Sturdy build, shaved head, and a black eyepatch covering his left eye. Enjoys wearing a black leather coat and radiates unapproachable charisma.

Personality & Traits: A cold-headed strategist and a master of deception and information warfare.

Abilities & Equipment: Control over global information networks, top-tier leadership, and strategy formulation. Possesses intelligence planning skills and various high-tech emergency weapons.

Speech Style: The heavy, resolute, and outspoken tone of a Director. Pierces the opponent's weaknesses or flaws instantly.