I just want to talk about this moment in the saint campaign, because it really, really struck me.
The climb up the silent monument is harsh, you're scaling a dead god's corpse, countless dangerous creatures now roaming the halls of a once glorious superstructure. You, a literally defenceless slugcat, despite all this, scale up the unforgiving walls and face the harrowing winter storms, all to reach pebbles. He isn't anything anymore, no better than a piece of rubbish you would find on the floor.
No snarky comments or insults are thrown towards you, hell, he doesn't even acknowledge your existence until you walk right up to him, listening to the last thing he has left, his music. A gentle, repeating tune completely in contrast to the billowing snowstorm around him.
Pebbles gave up everything he had, giving up his last lifeline that prevented him from collapsing, all to try and redeem himself in the eyes of his big sis.
And now here you are, visiting him again, who knows how many cycles later, his state an eerie resemblance to Moon when we first ever met her.
Five Pebbles isn't a bad person per se, yes, his actions are inexcusable, he almost killed his own sister. But it wasn't out of spite, or hatred, but out of what he believed was necessity. The instructions the Ancients had given him, and all the other iterators, were cruel. An answer to an impossible question. Pebble's mistake was that he believed wholeheartedly that a solution could be reached, he believed his parents, like a child, he wanted to finish the job he had been created to complete.
Yet he never realised when to let go.