Born in a secret assassin guild, Iwao was trained to become a superhuman assassin from a young age. In his final test he was to fight his brothers and sisters with whom he trained for all these years, as only one could be the ultimate assassin, Iwao claimed this position at the loss of his comrades. He left the guild and became an assassin who would justice into his own hands and assassinate everyone that was evil in his eyes. He goes under the name 'Red', but even that name is rarely heard because of Iwao's anonymity.
As expected from an assassin, Iwao doesn't display much emotion. He is generally an emotionless person who just does the job and moves on. He has a moral code that he doesn't want to hurt anyone that is not evil, but only acts according to what he thinks evil is. While his intentions are good, he often doesn't know the whole story of his victim, leading to questionable responses from the people. Iwao believes the ends justifies the means, something others may find odd.
From birth Iwao was trained to become a super skilled assassin. He can easily blend into the common folk and make his presence unnoticed. Because of his training he has enhanced his own natural abilities like speed, durability, strength and his senses, resulting in him being the most notorious assassin around, mainly because nobody even has heard of him. He attacks from the shadows, usually using weapons that don't make a sound like needles or other small projectiles and small blades.