They had known there was something that was meant to be done with bodies after someone died. But they hadn't known exactly what, when Jinana died from her wounds. Devouring was still new, the thought of it still disgusting to some, so they'd left her body where it was, just like how they always had in the past.

And then Bat ate her corpse.

From that point onward, they devoured their comrades so their strength would not go to their enemies. To honour their sacrifice. It was the only thing they could think of, out in that desolate place. But it still didn't feel right.

Serph nods, acknowledging Jack's offer. "Before we gained our demons, it never seemed important. When we died, we would rise to the clouds and fall back as rain." He closes his eyes. "Then we gained emotions. Suddenly the loss of our comrades became important, but we didn't know what to do when it happened."