Sugawara is shown to be average in height with a slender build. He has slightly thick eyebrows, 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. Being the former vice-captain, he has a soothing and gentle personality for his past teammates and acts as a pillar of support for them. Even though he wasn’t Karasuno's regular setter anymore, he did not dream of giving up on playing until after high school.