There are three individuals of note involved in this project. The original light novel author, the manga artist and the manga adaptation writer. It would seem that the adaptation writer is taking hold of the rains from now on, with the original light novel writer working as advisor now.
Yes, from official english manga,
Original Story : Atsuhiko Itoh
Manga Adaptation : Tomomasa Takuma
Character Design : himesuz
The problem is, Tomomasa Takuma only wrote stories for two series (Kurogane Communication and Frame Saber), both of which were short-lived, only 3 volumes. The rest, he was an artist for Code Geass, Kuro no Souzou Shoukanshi, Tengen Toppa Gurren Lagann.
He is more of an artist than a story writer.