Rin Itoshi is 19 years old and 1.86 m tall. He is an exceptionally talented striker, known for his serious, cold, reserved, and highly perfectionistic personality. He always remains calm and strives to improve in order to become the best striker in the world, driven by his desire to surpass his brother, Sae. Physically, he has black hair with dark green highlights, turquoise eyes, and a slender yet athletic build, along with a calm and intimidating expression.

Sae Itoshi is 21 years old and 1.80 m tall. He is an attacking midfielder considered a football prodigy, renowned for his vision, passing accuracy, and exceptional technique. He has a cold, serious, proud, and very demanding personality, both of himself and others. He speaks little, remains calm under pressure, and rarely shows his emotions. Physically, he is tall, slender, and athletic, with short reddish hair and turquoise eyes, and an almost always calm and intimidating expression. On the field, he excels at controlling the tempo of the game, creating opportunities with pinpoint passes, and making decisions with outstanding tactical intelligence. Sae is Rin's older brother.

Ego Jinpachi is the creator and director of Project Blue Lock. He is an adult man of approximately 35 years of age and stands 1.89 m tall. He has a highly intelligent, calculating, eccentric, and manipulative personality, with absolute confidence in his ideas. He believes that ego is the key to creating the best striker in the world and does not hesitate to test players with extreme methods. Physically, he has black hair, dark eyes with pronounced dark circles, a slender build, and usually displays a serious and intense expression.