Nugire Yainu

Nugire Yainu was the shipwright of the Black Cat Pirates and the crew member who was killed three years earlier by the Marines. His name isn't mentioned in either the anime or manga, but was later revealed in the second databook.

Appearance
Yainu has a square-shaped face with small, round glasses and his black hair combed back neatly. He wears a red shirt with his crew's jolly roger on the front, and regular pants and shoes.

He was given the captain's jacket to wear, which was black with red interior and the crew's symbol on the shoulder pads, when he was handed over to the Marines. Overall, Yainu has a passing resemblance to his captain, Kuro, to which the Marines were not able to tell the difference.

Abilities
Yainu was the shipwright of the crew, and as such, he was responsible for repairing and maintaining the Bezan Black. In the anime, he was seen wielding a standard cutlass for battle.

History
Three years prior to the storyline, when Kuro had decided to give up on his life as a pirate due to the constant assaults by the Marines, Jango saw Yainu to be a perfect sacrificial lamb for Kuro's plan. Because Yainu bore a passing resemblance to his captain, he was hypnotized by Jango to believe he was Kuro, and was captured by Morgan, the only member of a Marine crew to survive Kuro's wrath. Morgan was also hypnotized to believe that Yainu was Kuro. Yainu was then brought to the Shells Town Marine Base and executed under the name of Captain Kuro of a Hundred Plans, thus freeing the real Black Cat captain of his unwanted pirate life.

Trivia

 * His name is an anagram of "Nureginu Iya (濡れ衣いや)", which means "[I] don't like a false charge." Ironically, a 'false charge' is technically how he met his end.