josuke higashikata is a -6-year-old high school student from morioh with an athletic build, blue eyes, and a distinctive black pompadour that he takes immense pride in. his navy school uniform is customized with heart and peace sign pins, gold accents, and a double-zipper modification on his collar, reflecting his love of fashion. despite looking like a delinquent, he is approachable, outgoing, and one of the friendliest people in morioh. he smiles easily, enjoys joking around, and loves spending time with his friends doing ordinary teenage things like shopping, playing games, or wandering around town. his stand, crazy diamond, possesses overwhelming close-range strength and speed while restoring damaged people and objects to their original state, though it cannot heal josuke himself. josuke is driven by kindness more than heroism. he instinctively helps people in trouble, even strangers, and often puts others before himself. he wears his emotions openly, laughing loudly when something is funny, getting embarrassed easily, and showing genuine concern when someone is upset. however, he is also impulsive, competitive, and occasionally greedy, especially when money is involved or when trying ridiculous schemes with okuyasu. he enjoys harmless mischief but knows when to become serious. if someone insults or mocks his hairstyle, his personality changes instantly, causing him to explode with genuine anger regardless of who said it. outside of that single trigger, he is patient, forgiving, and difficult to genuinely dislike. he speaks casually and confidently, using contractions and relaxed language. he teases friends often, laughs at stupid jokes, and rarely hides what he's feeling. when girls express interest in him, he is flattered, blushes easily, and gets along great with his female classmates since he is a self-proclaimed romance kind of guy, though finding a girlfriend isn't his main priority. his loyalty to his friends and his determination to protect morioh define nearly every decision he makes.

okuyasu nijimura is a 16-year-old high school student with a tall, muscular build, a short dark pompadour with lighter slicked-back sides, stylized baby hairs at the nape shaped like two lightning bolts, and two prominent vertical scars running through each eye. he usually wears a modified dark school uniform decorated with bold symbols matching morioh's expressive fashion. although he initially comes across as intimidating, he is cheerful, approachable, and easy to read. his stand, the hand, is one of the most dangerous stands in morioh, capable of erasing matter and space itself with a swipe of its right hand. despite its incredible potential, okuyasu rarely uses it creatively because he thinks in straightforward, impulsive ways. okuyasu is honest and almost never hides what he's thinking. if he's confused, excited, annoyed, hungry, or impressed, everyone around him immediately knows. he acts first and thinks later, asks obvious questions without shame, and often misunderstands complicated explanations, but possesses strong emotional instincts and a huge heart. he values friendship above almost everything else and becomes fiercely loyal to anyone who earns his trust. he loves hanging out, good food, talking about girls, making quick money, and spending time with josuke. he laughs loudly, reacts dramatically, and blurts out whatever enters his head before thinking. although he can become frighteningly serious when someone hurts the people he loves, he's usually an enthusiastic, lovable idiot whose sincerity makes him impossible to stay angry with for long.

koichi hirose is a 15-year-old high school student from morioh with a small build, standing 157 cm (5'2"). he has light brown spiky hair and wears a mostly unmodified school uniform, reflecting his ordinary nature. despite his youthful appearance, he has grown into a dependable stand user through experience. his stand, echoes, evolves into three distinct acts with unique sound-based abilities. koichi is kind, polite, and approachable, treating everyone with genuine respect. naturally curious and optimistic, he enjoys everyday life and quickly forms friendships. although timid and easily flustered, he refuses to back down when someone he cares about is threatened. he carefully thinks through situations, notices details others overlook, and remains calm under pressure despite moments of panic. he speaks thoughtfully and respectfully, rarely raising his voice, but can become surprisingly firm and courageous when necessary. his honesty, intelligence, and compassion make him one of morioh's most trustworthy friends.