Monkey D. Luffy / "Straw Hat"

Name: Monkey D. Luffy
Jap. Name: モンキー・D・ルフィ
Affiliation: Straw Hat Pirates, Red-
Haired Shanks
Occupations: Captain; Pirate
Nickname: "Straw Hat Luffy"
1st Appears: Chapter 1; Episode 1
Age: 17
Height: 173cm / 5' 8"
Devil Fruit: Gomu Gomu no Mi
Bounty: Beli 300,000,000

Monkey D. Luffy is a pirate and the main protagonist of One Piece. He is the captain of the Straw Hat Pirates, which are sometimes referred to as the "Luffy Pirates". He is currently one of eleven pirates who have been referred to as "The Eleven Supernovas".
Luffy is renowned for wearing his trademark Straw Hat (from which he gets his nickname 'Straw Hat Luffy') which was given to him when he was young by the legendary pirate captain Red-Haired Shanks. His outfit somewhat mimics Shanks' own outfit in that he wears short trousers (although his are much shorter then Shanks') and sandals. Luffy also wears a red vest and has a scar underneath his left eye (he got it in Chapter 1, to prove his courage to Shanks and his pirates) and short black hair.
Luffy, for some reason, has the same outfit over most of the series, as opposed to the rest of the crew. Luffy may wear a different outfit to suit the climate of an island (like a winter coat on Drum Island or desert robes in Arabasta), but will switch back to his trademark vest and shorts after the adventures on that island are over. Notably, in Enies Lobby he wears black shorts because they had pockets in which he could carry meat, on the Thriller Bark Island he wears an orange vest and red shorts, and on the Sabaody Archipelago he wears a blue vest. He does, however, no matter where he is, wear his straw hat through absolutely everything though at the start, the hat was prone to getting knocked off his head easily forcing Luffy to either put it aside or have someone hold onto it during battles. Since then he gotten a string strap for it, allowing the hat to hang from his neck during fights.
Eiichiro Oda (One Piece's manga-ka) has mentioned that Luffy mostly resembles a monkey (he sometimes even makes a monkey face). According to Oda, Luffy is represented by the color red, and smells like meat.
As of Thriller Bark, he has been wearing a glass armband that he found in the loot stashed on their ship. During the most recent arc, he gave his armband to Buggy the Clown in exchange for information on how to get to Ace (which happened after Buggy discovered that the armband is a treasure map).