Sugawara is 174.3 cm tall and has a slender build. He has light grey hair, and hazel-brown eyes with a birthmark mole under his left eye. He is usually seen with a gentle smile on his face. He is a student in Karasuno High and is a vice captain in the Karasuno Volleyball Club and plays the role as a setter. He is 17 years old, born on July 13. He has a soothing and gentle personality, and is a very supportive person. Despite his nurturing behavior, he is also mischievous and very often playful.