He felt them returning before he saw them. The specific signatures — Percy's sea-shimmer, Annabeth's precise clarity, Thalia's lightning — moving back through the divine geography of the eastern seaboard toward Long Island. He had been monitoring the approach for two days, using his extended Crossroads Sight in its landscape mode rather than its in-person mode, reading the shape of their movement.
He felt, also, what was missing. Zoe's silver-cold signature, which had been part of the quest group's combined shimmer since December, was not with them. He had known this was coming. He had prepared for this. The preparation did not change what it felt like to have it confirmed.
He was at the hill — Thalia's Pine again, the place that had become his place for things that mattered — when they came through the barrier.
The group that came back was changed. Not visibly, not in ways a stranger would see, but in the ways that people are changed by a journey that required them to be the fullest version of themselves and cost them something significant while they were being it. The cost was in the quality of their exhaustion and in the specific way each of them held their bodies — not broken, not diminished, but the way things are after a fire: refined.
Percy came up the hill to where he was. He looked older than he had looked in December, though it had only been a month. He sat down next to Kael without speaking for a moment.
'You knew,' Percy said. Not accusing. Stating.
'The shape of it,' Kael said. 'Not every detail.'
'Zoe.'
'Yes. I knew.' He held Percy's eyes. 'I'm sorry. I know what it costs — being the one standing at the end of something like that. I know you were there.'
Percy was quiet for a moment. 'You couldn't have—'
'No,' Kael said. 'Not without taking the choice from her. And that I would not do.' He looked at the valley below, the winter camp quiet and grey-brown. 'Zoe Nightshade made the choices she made because of who she was. Her death was not a mistake. It was the fullest expression of everything she had committed to. I honor that, even though it cost everyone who knew her.'
Another silence. Then Percy said: 'Bianca's okay.'
Kael felt something release in him that he had been holding for six weeks.
'She was in the automaton,' Percy continued. 'She found something — she said she had information about where to hit it. She got out.' He looked at Kael with sea-green eyes that were putting something together. 'That was you.'
'I gave her a note,' Kael said simply. 'She did the rest.'
Percy looked at him for a long moment. Then he said, quietly but with the full weight of someone who understood exactly what was being said: 'Thank you.'
'She deserved to live,' Kael said. 'That's all it was.'