The Content On The Number 1 Headband
The Number One Headband is a sacred cloth Headband believed to bestow various things including Godhood, Immortality, Supernatural Powers, Great Knowledge, etc..
The One who wears the Number One headband is said to rule the world but to become the Number One you must kill the current Number One. Only those who wear the Number Two may challenge the Number One for ownership of the Sacred Headband. The Number One and Number Two are the two most famous Headbands but as revealed in Afro Samurai Season 1 episode 5 there are many other Headbands. It is unknown if the owners of the Headbands may challenge the Number One or if they were originally required to challenge the Headband Wielder of the ascending order. Example: the Number 3 could only challenge the Number 2 and be challenged only by the Number 4 and he could only be challenged by the Number 5 and so on. The Number One is rarely challenged as the owners of the Number Two Headband are seen, in the events of Afro Samurai Season 1, to often be killed by others seeking it. Additionally, the owner of the Number One could possess it.
Its unknown what particular canon abilities people who wield the headband possess. While its said to grant power, knowledge and immortality, the latter could just be a legend as Justice died of natural causes in the manga as the Number One. He was able to use his power to start a religion, influence people and the world around him but he wasn't an all-powerful being and still withered and died as a normal human. When Justice was featured in the anime, he was withered but still alive but its possible that was due to his abilities as a mutant.
Even when the protagonist Afro gained the headband for himself, it didn't seem like he became any more powerful than he was now as the Number 1. So while the headband could possibly grant mystical abilities, it isn't an all powerful item that can grant omnipotence or immortality.
- Justice owns the Number One Headband after he Kills Rokutaro, Afro's Father at the start of Season 1, and loses it to Afro when he is sliced into dozens of tiny pieces. He returns at the end of Afro Samurai: Resurrection possibly intent on reclaiming the Number One.
- Afro Samurai owns the Number One at the end of Afro Samurai Season 1 and loses it at the start of Afro Samurai: Resurrection, but reclaims it at the end of the movie.
- Sio (She technically stole the Number One)
- Rokutaro's Clone took the Number One from Sio when he kills her as she tries to aid Kuma.