Knights of Sidonia Vol. 5 (manga)

After a forbidden room is unsealed, heroic pilot Saito is no longer the only legendary Sidonian with a deceptive avatar on board.
Meanwhile, an incoming asteroid forces the spaceship's mobile units to skirmish in a positive-gravity environment. Calling the shots is Assistant Commander Yuhata Midorikawa, still new in her role, unsure but unshrinking.