Series by 弐瓶勉

Nagate Tanikaze, a young man raised in the underground depths of the massive spaceship Sidonia, emerges to become a pilot defending humanity’s remnants against the alien Gauna. Living in isolation, he trains on an outdated simulator, mastering skills that later prove vital. Chosen to pilot the powerful mecha Tsugumori, he joins the Sidonia’s military to confront the shape-shifting Gauna threatening the ship’s survival. Alongside allies like Izana Shinatose, a gender-neutral pilot, and Tsumugi Shiraui, a human-Gauna hybrid, he faces intense battles. His early missions involve adapting to Sidonia’s strict society and uncovering secrets about his own origins.