appears roughly 13 to 15 years old , with a slender , short - to - average teenage build ( about 158 cm / 5ft 2in tall and weighing 52 kg ). has pale skin and sharp yellow eyes. his short black hair has three thick white stripes running vertically down only the left side of his head. these markings — known as the lines of sanzu — represent his status as a grim reaper , though he views them as a horrific , asymmetrical defect. as he matures and connects his Sanzu lines , his appearance evolves , eventually gaining skull - shaped pupils and wearing a dark flowing cloak similar to his father , lord death. his suit features symmetrical white stripes running down the shoulders and vertically along the button placket his defining trait is an extreme, debilitating obsession with bilateral symmetry. if anyone points out his asymmetrical hair or any visual imbalance , he falls into severe depression or emotional tantrums. he fights in a close - to- mid - range style called gun kata / death god taijutsu , combining high - speed martial arts kicks with dual - pistol marksmanship.