Observer

An Observer (観測者), by simple terms, is someone that assists in seeing all the possibilities that occur in the world of BlazBlue due to all the time loops that happen because of the Master Unit, Amaterasu.

It is unknown how one actually becomes an Observer, but it is implied that one can be given the position by Takamagahara by having some degree of power, as the known beings that are Observers are the series' most powerful characters story-wise, or by becoming an "uncertain factor" in the time loop. Someone can actually agree to be Observed by another individual. Unfortunately, becoming an Observer means one must also abide by the title and cannot take action in most situations, which is a trait that has greatly annoyed Rachel Alucard. In BlazBlue: Chronophantasma, Relius Clover observed Arakune before promoting Litchi Faye-Ling as his Observer until she became too unstable to observe.

An Observer must observe themselves at anytime or they would disappear. Special beings like Hazama, Hakumen or Rachel will disappear without an Observer, though apparently Ragna's hatred for Hazama is enough to maintain him. Inexperienced Observers (such as Kokonoe) have no choice but to continue Observing themselves and others in order maintain their own existence. Those with very little experience, such as Litchi, may be forced to have their abilities as an Observer strengthened by machinery.

The idea of an Observer is based on quantum physics, the Schrödinger's cat experiment and Many-worlds interpretation.

List of known Observers

 * Rachel Alucard (Observing Hakumen)
 * Kokonoe (Formerly Observed Hakumen; Observing Arakune)
 * Saya
 * Noel Vermillion/Mu-12 (Temporarily Observed Yūki Terumi and Tsubaki Yayoi)
 * Takamagahara System (The AIs are no longer able to observe due to a virus)
 * Relius Clover (Formerly Observed Arakune)
 * Litchi Faye-Ling (Formerly Observed Arakune)