Walker's acting in the latest episode is so so brilliant.
The anger, the helplessness, the fear when he realises that Annabeth's dying, while Clarisse refuses to give up the fleece. You know, he would have gone to war, there and then. That he would have gone to any extent to get it to Annabeth in time. I know percabeth stans (me included) squeal about our OTP, but for me, this scene establishes Percy's fatal flaw.
It could have been anyone outside the cave instead of Annabeth. It could have been a close friend like Grover, a mean frenemy like Clarisse, an opponent like Luke or even a nameless camper who has only smiled at him once. If they were in a life or death situation and Percy had the power to change that outcome he would do it. Even if it jeopardises the quest, even if it challenges the authority of the Gods, even if it means you're playing with fate.
Because in that moment he isn't a forbidden child of the three or a hero that has to earn their glory. He's not Perseus, son of the sea God. In that moment, he's just Sally Jackson's son.