He was at camp when the quest group assembled — Percy, Annabeth, Thalia, and with Artemis captured, the quest roster filled by the Hunter Bianca and Grover and Zoe Nightshade as quest leader. He watched them from the hill, not Thalia's Pine — that felt like the wrong position for this moment — but the broad slope of the south hill where you could see the camp entrance clearly.
Bianca was in the group. She moved with the deliberate adjustment of someone learning a new way of being in her body — the Hunt's training already beginning to shape her posture, her awareness. She had the note. He could not know whether she had read it, whether she had believed it, whether she would remember it at the moment she needed it.
He had done what he could do. The rest was hers.
Zoe Nightshade stood at the head of the group with the specific quality he had expected and had not entirely been prepared for: a woman — girl, technically, though she had been the oldest-in-context for so long that age seemed irrelevant — who carried the weight of a very long service with the quiet dignity of someone for whom the service was genuinely everything. She was not sad. She was complete. There was a difference.
He had thought about Zoe for years. He had thought about whether there was anything he could do, should do, ought to try. He had returned, each time, to the same conclusion: no. Not because Zoe's life was not worth saving — every life was worth saving, and Zoe's specifically, the deep love she had for Artemis and for the Hunt and for the particular way she had chosen to be in the world. But because her death was the shape of who she was. She was going to hold Atlas. She was going to be poisoned. She was going to choose to let go. These were not accidents to be corrected. They were the fully intentional acts of someone whose agency was exactly the one thing that must not be overridden.
He could not save Zoe without taking her choice from her.
He stood on the south hill and watched the quest group leave and held the weight of this in the exact way Hecate had told him to hold things: not at a distance, not behind the buffer of foreknowledge. All the way in. The full weight of a thing that was going to happen and that he had decided — after years of consideration and with full understanding of what he was deciding — not to intervene in.
It was heavy. He let it be heavy.
Thalia caught his eye as the group moved past the camp's perimeter. She had known him for a year now. She knew he had foreknowledge; he had told her, in October, the same partial version he had given Percy. Her lightning eyes held his for a moment — a question in them.
He gave her the small nod of someone who is saying: I know. I am here. Go.
She went.