The Crystals of Orience remove the memories of the dead from the living. Knowing that a brother he loved is gone as well as his memories of him, Machina fears death and being forgotten, him and Rem being the only people in the world remembering their life in the little village they both grew up in. Being placed in Class Zero, Machina becomes insecure when he is no longer the best in his class, and strives to prove himself. He longs to become stronger to be able to protect people, and when told not even Class Zero can save everyone despite their strength, he vows to surpass his classmates.