Natsu is a lean, muscular young man of average height with a slightly tan skin tone, black eyes, spiky pink-colored hair, and has abnormal sharp canines; Natsu has a scar on the right side of his neck, hidden by his scarf. Following his intense battle with the Rogue Cheney of the future, Natsu gains a cross-shaped scar on the left side of his abdomen, a result of the two fatal wounds the man dealt to him during their altercations. He later attains a new scar, this one being a jagged blemish on his right cheek, which he gained following his battle with Zeref. Natsu's guild mark is red and is located just below his right shoulder.
Natsu's main outfit consists of a sleeveless, gold trimmed, black waistcoat, often left open and untucked, exposing his bare chest, a gold trimmed, black cloth around his waist that reaches his knees, held by a leather brown belt with an oval-shaped silver buckle, white knee-length trousers with black ribbon ties, a thick black wristband on his left wrist, black open-toed sandals and the scale-patterned scarf he received from his adoptive father, Igneel. He has also been known to wear a rolled up comforter strapped across his back, though he rarely carries it in battle.
In the year X791, Natsu's attire receives minor changes. He now wears an open-collared, one-sleeved long overcoat version of his original waistcoat, which is instead tucked in and zipped. The sleeve covers Natsu's left arm with a faux leather brown armband, leaving his Fairy Tail mark, as well as his entire right arm, consequently exposed. Natsu continues wearing Igneel's scarf and retains the same lower clothing. He now wears his wristband on his right wrist.
After his clothes were taken during his capture by Tartaros and later release, he now wears a new set of clothing: a black long-sleeved jacket, often left open, untucked, and no undershirt (much like his original waistcoat) with light-colored trimming and the sleeves rolled up to his wrists, black baggy pants held by a leather brown belt with a silver buckle around his waist, and a pair of dark brown, high-calf boots; there are several yellow, skull-like patterns on the jacket and pants.
In the year X792, Natsu is seen wearing a large, tattered, dark cloak with his trademark scarf. His pants are torn and patched and his arms and legs are wrapped in bandages. Later, he discards this outfit in favor of his old one, although he keeps the bandages on his right arm, which hide a draconian tattoo holding a portion of Igneel's power. Following the one-time use of Igneel's power, the tattoo disappears and Natsu abandons the bandages.