Son of nobleman George Joestar I, Jonathan is an honest, kind, and positive man whose life is fraught with tragedy after meeting his adopted older brother - and series antagonist - Dio Brando.
Adhering to the norms of the Victorian era, Jonathan's childhood attire consisted of a collared shirt, breeches, and a pair of long socks with dress shoes. This was either accompanied by a blazer, vest and tie, or a pair of suspenders. As a nobleman, he'd sometimes replace the tie with a ribbon like his father's.
When boxing, he wears a casual boxing outfit consisting of a tank top, shorts, and boxing gloves.
During his time with Erina, Jonathan also dons a Newsboy cap and a pair of knee-high boots.
When treading in the river, he wears a striped two-piece swimsuit.
As an adult, Jonathan is a tall (195 cm/6'5"), extremely muscular individual with a gentlemen's poise. His typical attire tends to reflect his noble background, characterized by stylized tunics over long sleeve shirts. Reoccurring articles of clothing include a cravat, bowtie, thick boots and a vest.
At home, Jonathan wears semi-formal attire consisting of a collared shirt, tie, and jacket with rolled up sleeves.
During University Rugby matches, he wears a standard striped rubgy shirt and pants with long socks.
When he sets out to Ogre Street to find a cure for his father's illness, Jonathan dons an entirely new outfit made up of a padded jacket and pants, complete with a deerstalker cap and a long cloak.
During his training with Zeppeli, he strips down to a stylized tank top with wristbands, and at some point a circlet.