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The invitation had arrived the way Apollo always did, without warning, without apology, and with an energy that suggested refusal was theoretically possible but spiritually not advisable.
Artemis had found it folded into a small golden square resting against her breakfast plate, sealed with a sun emblem pressed in wax the color of liquid fire. She broke the seal in one deliberate motion, then spread out the letter with the calmness of a goddess who had long since learned not to be surprised by her twin brother, and read it, her silver eyes already settling into the expression of someone encountering a mild but persistent headache.
"He says it is a performance," she said, voice perfectly level, eyes scanning the golden script with the careful attention of a huntress reading tracks in unfamiliar territory, "A ballad, apparently. He wishes us both present."
Percy reached across the table and plucked the letter from her fingers, and read it himself. Apollo had written in the extravagant, looping script of someone that considered penmanship an art form and himself its finest practitioner that has ever lived. The letter spoke of an evening performance in the grand hall of Olympus, an audience of gods and goddesses, and a ballad of his own composition, described in the letter as, and Percy read this part twice to be certain, a masterwork of celestial poetry destined to echo through eternity.
"That tracks," Percy said, setting the letter down.
Artemis retrieved it from his fingers with quiet precision, and she said simply, the matter settled, "We shall attend."
Percy looked at her, "Just like that?"
"He is my brother," she replied, folding the letter with practiced neatness, silver eyes lifting briefly to his, carrying that particular expression she wore when something was inevitable and she had made peace with it ahead of schedule, "And he will be insufferable for considerably longer than one evening if we do not."
Percy considered this, then nodded, "Fair point."
The grand hall of Olympus was arranged differently than it was during feasts.
The long tables had been cleared to the edges of the space, pushed back to form a wide central floor that gleamed like polished water beneath divine light. Seats had been arranged in soft curved rows, cushioned in silver and gold fabric that caught the ambient glow of the hall and returned it brighter. The columns that lined the space were threaded with thin golden ribbons that drifted faintly in the wind that moved through Olympus even inside the doors, an eternal, impossibly gentle current that seemed to breathe on its own.
The gods had assembled in varying states of interest.
Aphrodite sat three rows ahead with her chin resting in her hand and a smile that suggested she already knew something the rest of the room did not. Hermes lounged with his sandals propped on the seat in front of him until a sharp look from Hera made him remove them. Athena sat straight backed and reading, though Percy noticed her eyes had not moved across the page in several minutes. Ares looked as though someone had told him this was mandatory and he was processing that information with his characteristic patience, which was to say, not at all. Zeus sat at the center of the first row with the expression of someone prepared to be pleased by whatever happened, because the king of the gods attending a performance made whatever happened a success by default. Hera beside him was composed, poised, her royal gaze moving with quiet intelligence across the assembled gathering.
Percy and Artemis had taken seats slightly to the left of center, near enough for a lucid view of the performance space, he sat with his shoulder brushing hers, a contact neither of them acknowledged and neither moved away from.
The hall settled, conversation dropping into low murmurs, and then Apollo entered.
He arrived the way sunlight arrived, without hesitation and with complete confidence that it was welcome, he wore gold, naturally, a flowing tunic that caught the light and released it in soft pulses. His lyre was in his hands, the instrument divine in the way all things Apollo touched became beautiful, shaped from materials that had never belonged to the mortal world, strung with light itself. He moved to the center of the performance space with the ease of someone who had performed for gods and mortals and everything between for longer than entire civilizations had stood.
He surveyed the room, eyes bright with barely contained delight, and then his gaze landed on Percy and Artemis, the smile that crossed his face was the specific smile confirmed that he had been planning something for a while and was absolutely pleased with himself about it.
Percy felt a small, instinctive perturbation settle in his stomach, and Artemis, beside him, had gone very still.
"Welcome," Apollo said, voice carrying through the hall with effortless resonance, bright and golden as everything about him, "Tonight I shall perform a ballad of my own composition," he stopped for a moment, allowing the anticipation build with the timing of someone that had been performing for millennia, "A ballad about a particular moment that has lingered with me since it occurred. A moment of sacrifice, of a sky borrowed."
Percy blinked, something cold and specific moved through his chest, he turned his head very slowly toward Artemis, and she was already looking at him, silver eyes wide by precisely the fraction that meant she was encountering something she had not prepared for, her composure perfectly intact and simultaneously under siege.
Apollo strummed a single chord.
The sound moved through the hall like the first light of dawn, spreading outward from the strings in soft, resonant waves that seemed to settle into the very stones of Olympus, every conversation that had still been murmuring ceased completely, the gathered gods turned their attention fully forward.
Apollo began.
The ballad opened with the sky.
His voice described it not as mortals described it, not as vast and blue and distant, but as weight. As presence. As something alive and enormous and possessed of a gravity that pressed downward on everything that dared to stand beneath it. He sang of Atlas, of burden ancient as the world itself, of a titan shaped by an eternity of holding what could not be set down. His voice moved through the notes with the ease of breathing, each word chosen with the precision of a god that had composed poetry for as long as poetry had been invented.
Then the ballad shifted.
He sang of a goddess.
Auburn curls and silver eyes and a huntress whose pride was as old as the moon itself. He sang of her trapped beneath that weight, not broken by it, not crushed, but slowed, diminished, held in a stillness that was its own kind of suffering for someone whose nature was motion and purpose and the endless pursuit of the hunt. He sang of a goddess enduring because endurance was what she did, because she had never learned another way.
Artemis beside Percy had become something very close to a statue.
He did not look at her and kept his eyes forward, his jaw set, because he knew with absolute certainty that if he looked at her right now he would find something on her face that she would later wish she had not for him to see, and he loved her too much to corner her into vulnerability she had not chosen.
Apollo sang of a hero.
He did not name him immediately, which was somehow worse, because every god in the room was already turning the story over in their divine minds, already arriving at the answer. He sang of dark locks and sea green eyes and a son of the sea who carried the recklessness of tides in his blood. He sang of a hero that looked at a goddess bent beneath the sky and made a decision in the time it took a heart to beat.
Apollo lowered his voice to something softer, intimate, and the hall dropped with it, he sang of the moment the sky transferred.
Of a titan tricked, of divine weight landing on mortal shoulders that had never been built to hold it. He sang of the cold that was different for the hero, the way it pressed through him without the insulation of divinity, the way the sky learned his bones the way winter learned an unprotected coast. He sang of sea green eyes staying open, staying present, staying focused on the face of the goddess who had just been released from something that should not be carried alone.
Percy felt blood rushing to the back of his neck, several rows ahead, Aphrodite had turned slightly in her seat, the smile on her face the specific variety of radiant that suggested she was witnessing something she found profoundly satisfying.
Apollo built the ballad toward its center, voice rising, lyre responding, the notes layering into something that filled the hall completely.
He sang of the weight of the world held by wrong shoulders, of a hero that should have crumbled and did not, of stubborn mortal will grinding against divine burden like the sea grinding against a cliff face, patient and relentless and ultimately, impossibly, holding. He sang of what the goddess felt watching him hold what she had been forced to carry.
And then, Apollo slowed again, his voice became something almost private, something that felt strange to hear in a room full of gods.
He sang of a goddess that had spent millennia refusing to be moved by anyone, mortal and immortal, refusing to allow them close enough to matter, refusing to grant them the authority to cause the kind of ache that only came with genuine care. He sang of her watching a hero hold the sky with shaking shoulders and feeling, for the first time in all of millennia, something she could not immediately name and could not immediately dismiss.
Percy heard her breath beside him, very quiet, very controlled, the breath of someone keeping something carefully contained, yet he still did not look.
Apollo sang and sang, and now the hall was so silent that the drift of the golden ribbons on the columns was audible, a faint whisper of fabric against the divine atmosphere. He sang of the sky being taken back, of the hero released, of the moment they stood on the same ground again with the burden returned to its proper place. He sang of eyes meeting, of things not said that did not need to be said, of the beginning of something neither of them had language for yet.
And then, in the final verse, Apollo did name him.
Perseus.
The name rang through the hall like a struck bell, carrying in it everything the ballad had built toward.
Apollo sang it with the reverence of someone that had spent a great deal of time thinking about what names meant, about what it meant to have a name that stories clung to, that myths were woven around.
He sang it as the name of the hero that held the sky for a goddess. He sang it as the name of the mortal that had not stopped holding things for her since. The final chord rang out and faded slowly, the hall holding its breath as the last note dissolved into the air of Olympus.
Apollo lowered his lyre, his face, when Percy finally looked at him, was not the theatrical triumph of a performer looking forward for applause, it was something quieter, something genuinely fond.
The silence lasted several seconds before the hall broke into the sound of gods acknowledging something witnessed. Aphrodite was on her feet first, naturally, clapping with the enthusiasm of a goddess that had been personally vindicated. Hermes followed immediately. Athena had set her book fully aside to clap her hands. Ares appeared at least somewhat pleased that his time had not been wasted. Zeus was nodding with the expression of a king that found the proceedings satisfactory. Hera, he noticed when he looked toward the front row, was watching not the performer but the two of them, her golden eyes carrying a look he had learned to recognize, yet there was a genuine smile on her lips.
Percy finally turned to look at Artemis.
She was sitting perfectly straight, hands folded in her lap with the composed precision of a goddess that had been caught completely off guard and was handling it with everything she had. Her silver eyes were forward, focused on Apollo with the gaze of a sister preparing a very specific and detailed response to this situation, her cheeks, however, were faintly blushed.
"So," he said, pressed his lips together very hard, keeping his voice low, pitched only for her, "A ballad."
"Do not," she said, the words precise and clipped, she could not even look at him from her embarrassment.
"A masterwork of celestial poetry," he spoke, because he had never in his life been wise enough to stop when wisdom suggested otherwise, "Destined to echo through eternity."
Her jaw tightened, though the blush on her cheeks deepened, "Perseus."
"For what it is worth," he said softly, yet boldly leaned forward, "I would hold the sky for you, over and over."
Her silver eyes held his for a long, steady moment, ancient and luminous, carrying everything the ballad had tried to say and everything it had not quite reached, then she leaned forward and kissed him, slow and certain, one hand settling at his jaw with quiet reverence, when she pulled back, her forehead rested against his, "I know," she whispered, her breath touching his lips, "That is precisely what terrifies me."
Across the hall, Apollo caught his eye over the shoulder of an enthusiastically congratulating Aphrodite, he winked, golden and completely unrepentant.
Percy shook his head, the laugh escaping quietly into the hall, beside him, Artemis reached over and laced her fingers through his, the motion deliberate, a gesture as natural as tides following the moon. Her thumb traced a slow arc across his knuckles, the touch grounding and certain, she did not look at him when she did it, she did not need to.
Around them, Olympus glowed with its eternal light, and in the hall where gods had witnessed the ballad of a borrowed sky.
A story that would be told until the end of eternity.