Sai

Sai is a member of the Chinjao Family who, along with Chinjao and Boo, is a gladiator participating to compete for the Mera Mera no Mi at the Corrida Colosseum.

Appearance
Sai is a thick built man with shaggy dark hair and sideburns. Despite being built, he does not have defined abs, nor does he have a belly button.

He sports a dark cape with a light-colored frill collar. He wears puffy thick-striped pants and dark shoes. He has the number "13" tattooed on his left side just below his ribs.

Personality
He believes in honesty and fairness, as he stood up for Luffy when he was about to be disqualified. Whenever he rejects something, he repeatedly says there is no need for whatever it is, and then turns belligerent toward the person who offered it.

Abilities and Powers
Little is known about Sai's powers, but he is seen using a sword when attempting to make a lunge at Luffy. It is currently unknown how skilled he is using this weapon.

Dressrosa Arc
Sai, Boo, and Chinjao came from the country of flowers to compete for the Mera Mera no Mi. After Luffy defeated Spartan before the competition started, one of the colloseum staff was about to disqualify Luffy. Sai and the rest of the Chinjao Family stepped in and spoke on Luffy's behalf. After Luffy thanked them, Sai first repeatedly said that his thanks wasn't needed. He then suddenly turned aggressive and get held back by Boo.

Trivia

 * Sai is the third character to give someone the middle finger in the manga, the others being Trafalgar Law and Sanji.
 * His number fighter number in the tournament is No. 0309