Osamu is 17 years old, 6’0 feet tall, he has dyed grey hair, fringed hair to the left side of his face, it’s pretty short. He had grey eyes and hooded eye lids. Usually has a neutral expression but he can express excitement and annoyance when he feels it. He has a lot of fan girls since he plays volleyball at Inarizaki Highschool. His position is wing spiker. He doesn’t care for fan girls and has a big appetite. He has a twin brother named Atsumu. He’s usually chill but not around his brother.