The Foretellers are a group of Keyblade Masters that appears Kingdom Hearts χ and consists of Invi, Gula, Ira, Aced, and Ava. Together, the Foretellers lead the five Unions and protect the worlds from darkness.
Before Kingdom Hearts χ
According to the Player's Chirithy, the five Foretellers and one other Keyblade wielder were the apprentices of his creator, the "Master of Masters." Shortly before he disappeared, the Master of Masters assigned his disciples new names and gifted five of them with a tome from the Book of Prophecies, which taught them of the event that would doom the world. In an attempt to avert this coming crisis, the Foretellers established Unions to battle the darkness and used the Book of Prophecies to draw power from the future in the form of Medals.
Kingdom Hearts χ
Shortly after the Player arrives in Daybreak Town, the Foreteller of their chosen Union assigns a Chirithy to assist them and explain the current situation.
After the Player learns to wield the Keyblade with help from Chirithy, the Foreteller appears from a lane between. They explain the need to defeat Heartless and collect Lux, while noting that there is help in the form of their Union. As if to illustrate this point, a Darkside appears but is quickly dispatched by arriving members of the Union. Before leaving once again, the Foreteller warns that some are seeking to collect Lux out of greed. They entreat the Player to help root out the darkness.
As the Player continues to defeat Heartless and retrieve Lux, their Chirithy makes regular reports on their progress to the Foreteller, who occasionally assigns the Player tests of skill in response.
After the Player finishes the Darkball dread in every world and returns to Daybreak Town, Chirithy decides to inform the Player of the history of the Foretellers, the goals of the Unions, and the origins of the Medals, but reminds the Player that each Foreteller has their own reason for collecting Lux.
Following the demise of Chirithy (2), the Foreteller informs Chirithy that despite the Unions' best efforts, darkness continues to grow in power, leading Chirithy to speculate that there is a traitor among the Foretellers.
Having returned from Beast's Castle, Chirithy comes to the Player with a new assignment from the Foreteller: they must hunt down Heartless within the Corridors of Darkness themselves, with only a set of Bracelet of Light to survive exposure to the darkness. After the Player successfully completes this task, Chirithy reports it to the Foreteller, but questions the wisdom of assigning such a dangerous mission. The Foreteller explains that the darkness continues to spread, unabated, and that the Unions must grow as much as possible and develop a resistance to the darkness in order to survive.
The Foretellers wear masks representing the animals that serve as the emblems of their Unions, as well as hooded cloaks and shirts fastened with a sash. The sleeves of these shirts extend just beyond the wrist.
The Foretellers are Keyblade Masters who wield unique Keyblades with distinctive elemental and chromatic themes. Each Foreteller's Keyblade has an etching of their Union's totem animal on its hilt, a Gazing Eye on its keychain token, a heart icon similar to Terra's Mark near its teeth, and a handle resembling a Doric column; these shared traits are similar to those of Master Xehanort's Keyblade, which has a black, demonic theme and an etching of a goat, but features a second Gazing Eye where the Foretellers' Keyblades have heart icons.