Byojack

Byojack is the First Mate of the World Pirates and older brother of Byrnndi World.

Appearance
Byojack is an old man with a white beard and a green coat on. He wears a horned helmet that has one horn missing like World. He is as short and skinny as he was as a child, due to his disease.

Personality
He is often seen opposing his captain's plans, suggesting that they are illogical etc. He seems to care for his crew and wishes for his captain to view them all as companions again, though World doesn't trust him viewing them all as traitors, despite Byojack and the rest of the crew thinking otherwise.

Abilities and Powers
He has a body that's weak and fragile from sickness and usually sits on World's shoulder. His fighting strength is practically nonexistent. However, as the World Pirates' vice-captain, he likely has command over the other crewmembers, save for the captain.

Despite his lack of combat skills, he still plays an important role which is gathering intel for the World Pirates. He does so by using several Den Den Mushi with which he can eavesdrop on Marine and World Government conversations, thus making him very well informed. He also seems to act as a sort of adviser to his brother, making him seem quite wise when making choices.

Past
During his birth, or at least sometime as a child, Byojack acquired an unknown disease that prevents him from getting taller than he is now, and makes him incredibly weak. The disease wasn't life-threatening, as he lived to over 80 years old. Byojack told his brother World of the sea, and how the world is filled with many adventures, and he should go to sea. World agreed, but insisted on bringing his brother, too, and eventually, Byojack agreed.

When they grew up, they soon formed the World Pirates, having gathered various crewmembers. After clashing with several pirates and Marines, they were viewed as a major threat to the Government. When the Marines laid siege upon the crew 30 years ago, Byojack and the other crewmen retreated, leaving World to be captured and locked in Impel Down.