Natsu Dragneel

Natsu is a lean, muscular young man of average height with a slightly tan skin tone, black eyes, and spiky pink-colored hair. Natsu has a scar on the right side of his neck, hidden by his scarf. His red guild mark 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, white knee-length trousers, 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 version of his original waistcoat, which is instead tucked in and zipped. The sleeve covers Natsu's left arm, 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.

History:

Natsu was found by Igneel, the mighty Fire Dragon, as a baby. The Dragon opted to raise Natsu and taught him how to talk, write, and his own, signature form, of Lost Magic: Fire Dragon Slayer Magic. However on July 7, X777, Igneel, along with the other Dragons, mysteriously disappeared, leaving Natsu to fend for himself. Natsu then left on a quest to find Igneel and was eventually found by the Guild Master of Fairy Tail: Makarov Dreyar. Natsu ended up joining Fairy Tail, in which he formed a close, sibling-like rivalry with Gray Fullbuster and Erza Scarlet.

source: FairyTail Wikia