Mukuro

The man who grew up with Mugen in the Ryuukyuu Islands alongside his little "sister" Khoza. A ruthless, traitorous pirate who hung Mugen out to dry after they robbed a ship from Satsuma carrying raw sugar. He is once again encountered by the trio in episodes 13-14 "Misguided Miscreants Parts 1-2" wherein he and his crew of pirates attempt to rob and murder our trio, though they're easily thwarted by Mugen and Jin. He proposes to Mugen that they work together once more, promising him vast riches consisting of gold coins. Though Mugen initially refuses, Mukuro wears him down with a contest and once again pulls the same stunt he did in the past.