Try Knights

The alien race Gauna has been hunting out the last of mankind ever since it narrowly averted destruction many years ago and fled across the cosmos in a handful of enormous seed ships. Nagate Tanikaze emerges from his lifetime of seclusion deep below the seed ship Sidonia in the year 3394 in quest of sustenance on the top decks, only to find himself drawn into circumstances that are taking place without his knowledge. Tanikaze must protect humanity's last chance for survival and repel the Gauna when they launch their attack on Sidonia, assisted by his fellow troops and companions Shizuka Hoshijiro, Izana Shinatose, and Yuhata Midorikawa. Tanikaze is the hero Sidonia needs, and Sidonia no Kishi follows him as he learns about the world that has been above him his entire life.