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The air on the summit of Mount Olympus always smelled of ozone and high-altitude lilies, but to Percy Jackson, it mostly smelled like her.
It was a scent he’d grown to associate with trouble, adrenaline, and a strange, fluttering sensation in his chest that he stubbornly attributed to sea sickness, despite being a son of Poseidon. Thalia Grace was a literal storm contained in a leather jacket, all jagged edges and electric blue eyes that seemed to look right through him.
As the gods bickered in the throne room, celebrating the defeat of Atlas and the temporary stalling of the Titan army, Percy stood on a marble balcony overlooking the sprawling, golden city of the immortals. He should have been happy. Annabeth was safe—that was the main thing. They had survived the weight of the sky. But his eyes kept drifting back to the girl standing near the hearth, her spiky black hair backlit by the divine flames.
Thalia looked troubled. The prophecy was a lead weight around both their necks, but for her, the clock was ticking louder. Tomorrow was her sixteenth birthday. Tomorrow, she would either save the world or destroy it.
Percy gripped the cold marble railing. He wanted to go to her. He wanted to tell her that he didn't care about the prophecy, that he’d stand by her no matter what choice she made. But every time he got within five feet of her, his tongue turned into a lead weight and his brain felt like it had been hit by one of her father’s lightning bolts.
He was terrified of her. Not because she could fry him to a crisp—though she certainly could—but because of the way his heart hammered against his ribs when she laughed at his stupid jokes, or the way she’d lean into his space during a strategy meeting, smelling of pine needles and rainwater.
"You look like you're trying to calculate the square root of a tuna fish," a voice said.
Percy jumped, nearly toppling over the railing. Thalia was standing there, her hands shoved deep into her pockets, a faint, lopsided smirk on her face. Her Aegis bracelet glittered on her wrist, the Medusa-head design looking as grumpy as Percy felt.
"Thalia. Hey," he managed, his voice cracking slightly. He cleared his throat and tried to sound like a hero of legend instead of a fourteen-year-old boy whose voice was betraying him. "Just thinking."
"Dangerous pastime," she said, stepping up to the railing beside him. She was close—close enough that he could feel the static electricity jumping from her sleeves to his arm. "About the prophecy?"
"A little," Percy lied. "Mostly about the party. The gods sure know how to throw a bash while the world is ending."
Thalia snorted, a sharp, cynical sound. "They're celebrating the fact that they don't have to worry about the Big Three decree for another few decades—if we survive. They're celebrating us, but they're really celebrating their own skin." She looked out over the horizon of Olympus, her expression darkening. "I'm tired, Percy."
"I know," he said softly. He reached out, his hand hovering near hers on the railing, before he lost his nerve and pulled it back to itch his nose. "It’s been a long week."
"It’s been a long life." She turned to face him, her blue eyes searching his. "You've been weird lately."
Percy’s heart did a backflip. "Weird? I'm always weird. It’s my brand."
"No, weirder," she insisted, narrowing her eyes. "Since we left Westover Hall. You've been... distant. You barely look at me when we're eating at the mess hall. You argue with me more than usual, and then you just stop and walk away. If I didn't know better, I’d think you were still mad about the capture-the-flag incident."
"I'm not mad about the water," Percy said quickly. "That was... actually a pretty good move."
"Then what is it?" She stepped closer, her brow furrowed in genuine confusion. "Did I do something? Is it because I'm a daughter of Zeus? Does the 'Sea God vs. Sky God' thing actually bother you that much?"
"No! No, Thalia, it’s not that at all." Percy felt the heat rising in his neck. He looked down at his sneakers. How could she be so smart, so perceptive in battle, and so completely oblivious to the fact that he was staring at her because he was trying to memorize the way the light caught the silver tips of her hair?
She misinterpreted his silence as confirmation. Her shoulders slumped slightly. "Look, I get it. We're the two biggest targets in the world. Being around me is like carrying a lightning rod in a thunderstorm. If you need space to breathe, I won't hold it against you."
"It’s not about space," Percy blurted out. "It's the opposite of space. It's—"
But he was cut offset by the sound of silver horns. The crowd in the throne room parted as Artemis, the Moon Goddess, approached the hearth. She looked young, no older than Thalia, but her eyes held the depth of the night sky. She looked toward Thalia with a gaze that was both regal and inviting.
"Thalia Grace," Artemis called out, her voice ringing like a bell. "A word, if you please."
Thalia glanced at Percy, a flicker of uncertainty in her eyes, before she turned and walked toward the goddess. Percy stayed rooted to the spot, his stomach dropping into his shoes. He knew what was coming. Zoë Nightshade was gone. The Hunters were short a lieutenant. And for Thalia, the offer of immortality was more than just a prize—it was an escape. If she joined the Hunters, she would never turn sixteen. The prophecy would skip her and fall squarely on Percy’s shoulders.
He watched them speak in low tones near the flickering fire. Artemis gestured to the stars; she spoke of the freedom of the hunt, of a life without the complications of men, of a sisterhood that would never age, never die, and never have to face the burden of a destiny they didn't choose.
Percy felt a cold, hollow ache in his chest. If she took the oath, she’d be gone. Not dead, but gone from his world. He’d never see her in the arena at camp again. He’d never have to fight her for the last slice of pizza. He’d never have to worry about his heart stopping when she smiled. She would be safe, and she would be eternal. It was the logical choice. It was the smart choice.
And he hated it.
He watched Thalia look back at him. Her face was a mask of conflict. She looked at the goddess, then at the assembled gods, and then her gaze drifted back to the balcony where Percy stood, half-hidden in the shadows of a marble pillar.
Artemis said something else, a final, tempting offer. Thalia hesitated. She looked like she was about to step forward, to kneel and take the vow that would change her life forever.
Then, she stopped. She shook her head slightly and whispered something to the goddess. Artemis looked surprised, then thoughtful. She nodded slowly, placing a hand on Thalia’s shoulder in a gesture of respect, before fading back into the crowd of immortals.
Thalia didn't join them. She didn't take the silver parka.
Instead, she turned and marched straight back to the balcony. Her pace was frantic, her boots clicking sharply against the tile. When she reached Percy, she didn't stop until she was inches away from him, forcing him to look up.
"Why are you looking at me like that?" she demanded. Her voice was trembling, but not with fear. It was anger—or something close to it.
"Like what?"
"Like I'm a ghost! Like I’ve already left!" She threw her hands up. "Artemis just offered me everything. She offered me a way out of the prophecy. She offered me a seat at her side, a life of adventure without... without all this." She gestured vaguely to the world below. "And do you know what I did? I asked her for a minute to think. And while I was thinking, I looked at you."
Percy’s pulse was racing so hard he thought he might pass out. "Thalia—"
"No, shut up, Jackson. My turn," she snapped, though her eyes were shining. "I looked at you, and you were standing here looking like the world had already ended. You didn't yell at me not to go. You didn't tell me to stay. You just stood there with that stupid, heartbroken look on your face, and it made me realize something."
"What?" Percy whispered.
"It made me realize that I have no idea what’s going on in your head," she said, her voice dropping. "We’ve been through hell and back. We fought a Titan together. We held the sky. And yet, for the last three days, you’ve been acting like you can’t stand the sight of me. If I’m going to stay—if I’m going to face this prophecy and potentially die tomorrow—I need to know why."
She stepped even closer, her leather jacket brushing against his shirt. "Tell me the truth, Percy. Why have you been keeping your distance? Is it because you want me to join the Hunters? Is it because you want the prophecy for yourself so you can be the big hero?"
"No!" The word erupted from him before he could stop it. "Gods, Thalia, no! That’s the last thing I want."
"Then what?" she challenged. "Why won't you look at me?"
The dam finally broke. All the nerves, all the adolescent awkwardness, and the sheer, terrifying weight of his feelings for her came crashing down.
"Because I'm terrified of you!" he yelled back, his voice echoing off the Olympian architecture. A few minor deities near the nectar fountain turned to stare, but he didn't care. "I'm terrified because every time I look at you, I forget how to breathe. I'm terrified because I like you—not like a friend, and definitely not like a sister. I like you in a way that makes me want to punch the prophecy in the face for even suggesting something might happen to you."
Thalia froze. Her mouth parted slightly, her electric blue eyes widening until they looked like twin moons. The sparks that usually danced around her fingertips suddenly went still.
"You... what?" she breathed.
"I've been keeping my distance because I'm a mess," Percy said, his words tumbling out in a frantic rush now that he’d started. "I didn't want to distract you. You have enough on your plate with the birthday and the Titan Lords and the saving-the-world stuff. I thought if I stayed away, it would be easier for you. And then Artemis offered you the Hunt, and I realized that if you took it, I’d never be able to tell you. I’d have to go the rest of my life watching you from a distance, knowing I was too chicken to say anything while I had the chance."
He took a deep breath, his chest heaving. "I don't want you to be a Hunter, Thalia. I want you to stay. I want you to be here, even if we're arguing, even if we're fighting, even if the world is falling apart. I just want you."
The silence that followed was longer than the trek across the Labyrinth. Percy felt exposed, raw, like he’d just handed Kronos his own heart on a silver platter. He waited for the lightning. He waited for her to laugh, or to tell him he was a kid, or to call for Artemis and take the vow right then and there just to get away from him.
Instead, Thalia started to laugh.
It wasn't a mean laugh. It was a soft, breathless sound of pure disbelief. She covered her face with one hand, her shoulders shaking.
"Percy Jackson," she said through her fingers. "You are the biggest idiot in the history of Western Civilization."
"Yeah," he sighed, his shoulders drooping. "I get that a lot."
"No, you don't understand." She dropped her hand, her expression a mix of amusement and something much softer, something he’d never seen directed at him before. "I thought you hated me. I thought you were so annoyed by my 'attitude' that you were counting down the seconds until I turned sixteen so I could fulfill the prophecy and leave you alone."
Percy stared at her. "Are you serious? Thalia, you're... you're amazing. You're the strongest person I know. Why would I want you to leave?"
"Because I'm difficult!" she said, stepping into his space again, but this time there was no anger in it. "I'm loud, I'm pushy, and I have a literal temper like a thunderstorm. I spent half the quest wondering why you were looking at Annabeth with such relief and looking at me like I was a ticking time bomb."
"I look at Annabeth like that because she’s my best friend and she was captured," Percy clarified. "I look at you like that because you're... well, you're the bomb."
Thalia's cheeks flushed a soft pink, a color that looked startlingly pretty against her pale skin and dark makeup. "You really have no game, do you?"
"Zero," Percy admitted. "Maybe negative game."
She reached out, her fingers grazing his forearm. The static was there, but it didn't sting this time. It felt like a low-voltage hum, a connection that grounded them both. "I told Artemis no."
Percy’s heart leaped. "You did?"
"I did. Even before you said all... that," she said, gesturing to him. "I told her I wasn't ready to give up on the world. I told her I had things left to do. People I wasn't ready to leave behind." She looked him in the eye, her gaze steady. "I didn't know you felt like this, Percy. I'm... I'm not exactly used to people liking the 'non-scary' parts of me. Mostly because I don't show them."
"I like all the parts," Percy said, his voice regaining its strength. "Even the Aegis part. Though the shield is still creepy."
Thalia chuckled, and the sound was like music. "It’s supposed to be creepy."
She looked back toward the throne room, where the celebrations were still in full swing. The pressure of the prophecy hadn't gone away—it was still there, looming in the darkness—but for the first time in months, it didn't feel like an ending. It felt like a challenge they would face together.
"So," she said, looking back at him. "Tomorrow is my birthday. If I don't turn into a world-destroying weapon of mass destruction, what are you going to do about it?"
Percy felt a grin spreading across his face, a real, genuine one. "Well, I was thinking maybe we could get some blue food. And maybe you could show me how to do that thing where you make people's hair stand on end with just a look."
"I think I already did that to you," she teased.
"You did," he admitted.
Thalia leaned in, her forehead resting briefly against his. It was a small gesture, but it felt more significant than any oath. "I'm staying, Percy. Not for the prophecy, and not for my dad. I'm staying for me. And maybe a little bit for the guy who’s too nervous to look me in the eye."
"I'm looking at you now," he pointed out.
"About time," she whispered.
She didn't kiss him—not yet. There was too much noise, too many gods, and too much history between them to bridge in a single second. But she didn't pull away, either. They stood there on the edge of the world, a son of the sea and a daughter of the sky, two halves of a storm that was just beginning to gather.
As the sun began to set over the immortal city, casting long, golden shadows across the marble, the fear that had been gnawing at Percy for weeks finally subsided. The future was still uncertain. The war was still coming. But as Thalia’s hand slid into his, her fingers interlacing with his own, the electricity between them no longer felt like a threat. It felt like a spark.
And in the heart of Olympus, amidst the gods and the monsters and the weight of ancient fates, two demigods found something that the prophecy could never touch.
"Happy early birthday, Thalia," Percy said.
"Thanks, Seaweed Brain," she replied, her thumb brushing against the back of his hand. "Let’s go see if we can find some of that ambrosia cake. I have a feeling I’m going to need the energy for whatever comes next."
They walked back into the light together, leaving the shadows of the balcony behind. For the first time, the weight of the sky felt light as a feather, and the horizon didn't look like an end—it looked like a beginning. The storm was coming, yes, but for the first time, Percy wasn't afraid of the rain. He was looking forward to the lightning.
The next morning, the sun rose over Camp Half-Blood with a clarity that felt almost intentional. Apollo must have been feeling particularly proud of his sister’s victory, because the sky was a vibrant, cloudless blue.
Percy sat on the pier of the canoe lake, dangling his feet in the water. He was waiting.
The deadline was noon. That was the moment Thalia would officially turn sixteen. The camp was quiet, an uneasy tension hanging in the air like the humidity before a summer gale. Chiron was at the Big House, likely checking the horizon every few seconds. The other campers were going about their chores, but with frequent, nervous glances toward Zeus’s cabin.
Percy felt a presence behind him before he heard it. The tell-tale crackle of energy.
"You're late for breakfast," he said without turning around.
"I’m the birthday girl. I get to sleep in," Thalia said, stepping onto the pier and sitting down beside him. She wasn't wearing her leather jacket today—just a black Camp Half-Blood t-shirt with the sleeves rolled up.
"How do you feel?" Percy asked, turning to look at her.
She looked at the sky, then at her own hands. "Normal. Which is weird. I expected to feel... I don't know, a surge of power? A sudden urge to overthrow the government? But I just feel like Thalia."
"That’s a good thing," Percy said. "The world seems to be intact."
"For now." She bumped her shoulder against his. "I talked to Chiron this morning. He was surprised I didn't take the Hunt. I think he had a whole speech prepared for my departure."
"What did you tell him?"
"I told him I had a better offer," she said, a mischievous glint in her eyes.
Percy felt his face heat up again. "Oh yeah? What offer was that?"
"The offer to see you fail miserably at sword practice this afternoon," she joked, but then her expression softened. She reached out and took his hand, right there in the open, where any passing camper could see. "And the offer to see what happens when the prophecy isn't the only thing defining us."
Percy squeezed her hand. The water in the lake rippled in sympathy with his mood, small waves lapping gently against the wood of the pier. "I like that offer."
"Me too."
They sat in silence for a while, watching the naiads play in the depths. The weight of being a child of the Big Three would never truly go away. The monsters would keep coming, the Titans would keep rising, and the gods would keep being their difficult, demanding selves. But as the sun climbed toward its zenith, Percy realized that for the first time, he wasn't looking toward the future with dread.
He looked at Thalia—the girl who chose to grow up, the girl who chose to stay, the girl who was currently leaning her head on his shoulder.
"Hey, Percy?"
"Yeah?"
"If I do end up destroying the world later this afternoon... you'll still buy me that blue pizza, right?"
Percy laughed, the sound carrying across the water, bright and hopeful. "Strictly on the condition that you let me have the last slice."
Thalia smirked, her blue eyes sparking. "Don't push your luck, Jackson."
The clock struck twelve in the distance. The world didn't end. The sky didn't fall. Instead, the wind picked up, carrying the scent of strawberries and salt spray across the valley. Thalia Grace was sixteen, the prophecy had moved its focus, and for one beautiful, electric moment, everything was exactly as it should be.
They stood up together, two heroes who had survived the stars and the shadows, and walked back toward the cabins. They had a war to win, but they also had a life to live. And as far as Percy was concerned, as long as he was walking beside the storm, he could handle whatever the tides brought in.