The Six Heads are a group of S-Ranks.
The Six Heads are a group of S-Ranks. Only those who have gained the power to destroy a Metaphysical that cannot be defeated alone are legible to join. The way to become an S-Rank (thus joining the Six Heads, though it would not be six anymore,) is to fight a member and gain the respect (by fighting them). Each member rules over the Saviours of their country. However, they do not have freedom to do as they please because of the power that they wield. Moroha is the seventh member of the group of Six Heads.