let it be on your head
Sometimes guilt is complicated, and sometimes it's very, very simple.
We've been on about it enough, haven't we? A Blade's Core is their replacement, their facsimile, their proxy as a passthrough for what humans have in hearts.
They're mounted upon chests, easy targets for proper, supplicative gestures of shock or shame. All truth is in hearts, in Cores.
But Jin, special Jin, splendid Jin, specious Jin, did not have it quite that way. He ate Lora's heart, to compensate, and the Core Crystal in his forehead burned, burned, burned.
You are not for this. You did not want this. You did not deserve this.
Let it be on your head.