Magical Girl Lyrical Nanoha A's Portable: The Gears of Destiny Material Girls. (マテリアル娘。 Materiaru Musume.) is the yonkoma comedy manga written by Masaki Tsuzuki and illustrated by Sōjūrō Sakaki on the Comp Ace magazine since November 2011 (Jan-2012 issue), with the Materials being the main characters.

(Source : nanoha.wikia)