Reverie (トロイメライ), known as Traumerei in the Japanese version and also referred to as the Ring Guardian (環の守護者), is a large and powerful archaism.


Reverie and others like it were created by Aureole as its defence mechanism during the Sealing Plan of the Liber Ark, hence its alias of Ring Guardian.

Reverie was first discovered in the Sealed Area facility beneath Grancel Castle, capable of combining with supporting archaisms to form an even stronger machine.


Reverie Dragion (トロイメライ=ドラギオン) is a new version of the machine, created by Ouroboros. The Reverie Dragion is capable of flight.

One such machine was operated by Enforcer Loewe during the Gospel Plan.