Ryvius Manga
A companion manga was released in Japan in 2000. Created by Shinsuke Kurihashi, and released by MediaWorks Publishing, the manga details the voyage of the Ryvius from the character viewpoints of Aoi Housen, and to a lesser extent, her roommates Kozue Izumi and Reiko Ichikawa. This is in contrast to the anime, which had been seen through the eyes of the Aiba brothers, Ikumi Oze, and other mostly male characters. As such, the manga does not follow the anime "to the letter", but provides episodes and plotlines previously unseen.
The English-language rights to the Ryvius manga were acquired by ComicsOne, and the first volume of the English version, covering the anime episodes 1-13, was released in October 2004. The second and final volume, covering the remainder of the series, was expected to be released in January 2005. After ComicsOne was taken over by DrMaster, Volume 2 of the Infinite Ryvius manga was delayed. It was finally released under the new DrMaster label in May 2005.
Read more about this topic: Infinite Ryvius