Time-Space Administrative Bureau

The Time-Space Administrative Bureau, officially Administrative Bureau and commonly abbreviated as TSAB or the Bureau, is an interdimensional security force formed jointly by a union of several worlds, including Midchilda, where it is based. They also monitor cultural growth and provide disaster relief to each world, especially when it involves magic and Lost Logia.

In Magical Girl Lyrical Nanoha and A's, TSAB is only scarcely represented by the Arthra but StrikerS reveals that the Administrative Bureau is a full-out military-like force. The TSAB Main Office is located in the deep dimension space, and the TSAB Midchildan Central Office, in Cranagan. While it is mainly there to provide support for Nanoha Takamachi in the first two seasons, in the third series, Nanoha has enlisted in the organization herself and become one of the most powerful mages there, earning the nickname "Ace of Aces".

In the Heroes Coalition fics, TSAB is part of the Multiverse Government and is allies with the Heroes Coalitions.

Notable TSAB Members

 * Nanoha Takamachi
 * Fate Testarossa Harlaown
 * Hayate Yagami
 * Signum
 * Shamal
 * Vita
 * Zafira