|Primary caster||Yuuno Scrya|
|Japanese name||サークルプロテクション |
|First app.||Nanoha (ep.5)|
Circle Protection (サークルプロテクション Sākuru Purotekushon) is a high-level barrier-type defensive spell under the Midchildan system.
This development of Protection generates a strong hemispheric barrier from the magic circle under the caster's feet to protect the caster and his/her nearby area. When cast in the air, it is cylinder-shaped instead of hemispheric, with one more magic circle above the caster.
- Circle Protection is first seen in Nanoha (ep.5) casting by Yuuno, defending himself and Nanoha Takamachi against Alph's attack.
- In A's (ep.5), Alph herself deploys it in the air to defend not only herself, but also Nanoha and Fate Testarossa against Thunder of Destruction from the Book of Darkness. Alph has learnt Circle Protection from Yuuno, when they are staying on Arthra.
Possible uses of the spell are noted as follows:
- In The MOVIE 1st, Chrono Harlaown casts a barrier to protect himself and Nanoha against Alph's Photon Lancer Multishot. Its hemispheric coverage is similar to Circle Protection but there is no magic circle below his feet.
- In ViVid (ch.14) / ViVid anime (ep.6), Caro Ru Lushe casts a defensive barrier to protect Einhard Stratos who is still under healing process, when Lutecia Alpine and Rio Wesley approach for a two-on-one attack. The unnamed barrier, however, does not protect the caster (who is usually in the centre to generate the magic circle) and is more like Defenser Plus cast on allies or the Modern Belkan Shell Barrier.