Χ series

The χ series (χシリーズ) is a series of titles in the  series that are set in the ancient past, during the "age of fairy tales", long before the adventures of Sora and the battle against Master Xehanort.

Overview
This storyline covers all games that canonically take place before Kingdom Hearts Birth By Sleep, sometimes referred to as "the age of fairy tales". This era was a golden age for Keyblade wielders, where the world was whole and light prevailed. However, this era was soon wrought with turmoil and destruction due to the introduction and influence of darkness on the young and impressionable warriors, which culminated in the Keyblade War. Many innocent souls lost their lives, though the art of Keyblade wielding continued for some time after the dust settled. A group of guilds run by the foretellers all led by the Master of Masters formed to bring order the increasingly chaotic and fragmented world, though the master has ulterior motives unclear to everyone else. At this time, the players themselves go on adventures and meet new friends and enemies, and eventually meet a grim fate and are forced to sacrifice themselves to become Dream Eaters.

Many years later, Xehanort, who Player connected hearts with before their demise, trains to become a Keyblade master alongside with Eraqus and his other apprentices. After many tragic events, including the deaths of many of his friends, his heart was broken and corrupted by darkness. After meeting a time traveling Ansem, he is explained about his future plan to summon the seven pieces of light and thirteen pieces of darkness to reforge the χ-blade and summon the true Kingdom Hearts. He spent the next several decades study about the history and workings of Keyblades, as well as the Heartless, Nobodies, and the process of recompleting. This all culminates in him discovering Terra, Aqua and Ventus, as he wishes to use them and their insecurities to do his bidding and forward his master plan.

Main characters
File:Player (Male) KHX.png| File:Master of Masters KHXBC.png|The Master of Masters File:Foreteller Ira KHXBC.png|Ira File:Foreteller Aced KHXBC.png|Aced File:Foreteller Invi KHXBC.png|Invi File:Foreteller Gula KHXBC.png|Gula File:Foreteller Ava KHXBC.png|Ava File:Luxu KHXBC.png|Luxu File:The Boy in Black KHIII.png|Xehanort File:The Boy in White KHIII.png|Eraqus

Antagonists
File:Darkness KHUX.png|