Hayato Ijuuin (伊集院 隼人)

Umibozu fought against Ryo back in Central America, and had his eyes damaged by Saeba. This should make them enemies, but both men shrug off the past since what happened in the war was not personal. That doesn't mean that they don't fight, though. They often find each other on the same case, but on different sides, and have dueled more than once.