Knights of Sidonia

is a Japanese manga series written and illustrated by Tsutomu Nihei. It was serialized by Kodansha in their seinen manga magazine Monthly Afternoon between April 2009 and September 2015, with its chapters collected in 15 tankōbon volumes. It tells the story of Nagate Tanikaze, an "under-dweller" destined to become a Garde pilot, whose mission is to defend the massive starship Sidonia from a hostile alien species called Gauna.