The battle raged on, a whirlwind of bronze and fury. Luke, empowered by his defiance, fought with unmatched skill, deflecting Kronos's every blow. His celestial bronze sword sang a song of defiance, its light illuminating the clearing. But even with Annabeth's strategic guidance and Grover's relentless support, the Titan remained a formidable opponent.

Kronos, frustrated by Luke's unexpected resistance, unleashed a powerful blast of energy. It slammed into Luke, sending him flying across the clearing. He landed with a heavy thud, coughing up blood, his resolve momentarily shaken.

"Foolish child!" Kronos boomed, his voice filled with a sickening relish. "Your defiance is futile. You cannot hope to defeat a Titan."

Fear gripped Annabeth's heart as she saw Luke falter. But before Kronos could deliver the final blow, a blinding light erupted from the forest depths. A figure emerged, shrouded in radiant energy, its identity obscured. The light pulsed, driving back the shadows and momentarily halting the battle.

"Who dares interfere?" Kronos roared, his voice laced with a hint of surprise.

The figure stepped forward, the light slowly dissipating to reveal a majestic figure cloaked in shimmering blue armor. It wielded a powerful trident, its prongs crackling with celestial energy.

"Kronos," the figure boomed, its voice deep and resonating. "Your reign of terror ends now."

Annabeth gasped, recognition dawning on her face. It was Poseidon, Estelle's grandfather, and Percy's father.

Poseidon glanced at Estelle, who still huddled behind the fallen tree. Their eyes met for a brief moment, a silent understanding passing between them. He then turned his attention back to Kronos, his expression hardening.

"You will not touch my granddaughter," he declared, his voice an unwavering promise.

The ground rumbled as Poseidon charged towards Kronos, the earth itself trembling beneath his mighty footsteps. The battle that followed was a clash of titans. Poseidon wielded his trident with unmatched skill, his attacks fluid and powerful. Kronos, fueled by rage and desperation, fought back with the fury of a cornered beast.

Annabeth, realizing that Estelle was now exposed, turned to Grover. "We need to get her to safety," she said urgently. "Take her to the border of the camp. I'll hold them off for as long as I can."

Grover hesitated, fear etched on his face. "But what about you?"

"I'll be fine," Annabeth said, forcing a smile. "Just go. Now!"

Grover, understanding the urgency, scooped up Estelle in his arms. "Hold on tight, little one," he whispered, and dashed into the trees.

Estelle, clinging to Grover's fur, looked back at the battlefield one last time. She saw her father battling the monstrous Titan, Annabeth and Luke fighting alongside him, and a flicker of hope ignited within her. Perhaps, just perhaps, they could win.

As Grover and Estelle disappeared into the forest, Annabeth refocused on the battle. She knew she couldn't match Poseidon and Kronos's power, but she could still distract them, allowing Grover enough time to reach Camp Half-Blood and deliver their message. With a determined yell, she charged into the fray, joining the fight with renewed ferocity.

The outcome of the battle remained unknown, hanging in the balance like the fate of Olympus itself. But one thing was certain: Estelle, the demigod daughter of Poseidon, was no longer the innocent child she once seemed. Her journey had just begun, and the weight of the world, it seemed, rested upon her small yet determined shoulders.

***

The world faded in, a blurry mess of white ceiling and flashing blue lights. A throbbing headache pulsed with each beat of her heart. Where was she? Estelle tried to sit up, but a wave of dizziness washed over her, forcing her back down.

A familiar voice, laced with worry, cut through the haze. "Estelle? Honey, you're awake."

Estelle squinted towards the voice and saw Sally, her face etched with concern. "Mom?" she croaked, her voice hoarse. "What happened?"

Sally offered her a small, shaky smile. "There was an accident. You took a nasty fall at the park, but you're okay now. You're safe."

Estelle didn't believe her. The memories, though fragmented, flickered in her mind. The clearing, the fight, Annabeth... where was Annabeth? Panic welled up, constricting her throat.

"Where's Ms. Chase? And Grover? And... where's my dad?" she blurted out, the words tumbling over each other.

Sally's smile faltered. She exchanged a worried glance with Paul, who stood frozen by the doorway.

"Estelle," Sally began, her voice gentle but firm. "There's something you need to understand."

Estelle felt a tremor run through her. "What? What is it?"

Paul stepped forward, his eyes filled with a mixture of sadness and fear. "Honey," he began, kneeling beside the bed, "there's... there's something we haven't told you."

A cold dread settled in Estelle's stomach. "What haven't you told me?"

Paul took a deep breath. "You... you aren't our biological daughter."

The world seemed to tilt on its axis. Estelle stared at them, her mind refusing to process the words. "What?" she whispered, her voice barely a breath.

"We adopted you when you were a baby," Sally explained, her voice thick with emotion, and worry that Estelle would see through her lie. "We loved you from the moment we saw you, and we always wanted you to know..."

"That you lied to me all this time?" Estelle choked out, tears welling up in her eyes. "About everything?"

Sally reached out a hand, but Estelle flinched away, the betrayal burning in her chest. Images of the battlefield, the strange power that pulsed within her during the fight, Annabeth's words about her father... they all came rushing back, piecing together a horrifying truth.

"Who is my father?" she demanded, her voice trembling with a newfound anger.

Sally and Paul exchanged another hesitant glance. Paul finally spoke, his voice barely above a whisper, "Your father... your father is Percy Jackson. Sally's son."

Estelle froze. The name echoed in her mind, a terrifying confirmation of her suspicions. She wasn't just some ordinary girl. The weight of this revelation crushed her, drowning out the worry for Annabeth in a tide of overwhelming confusion and anger.

"And Annabeth?" she asked, her voice laced with accusation. Why didn't you ever tell me?"

Sally's face fell. "We... we didn't know how to. We wanted to protect you, Estelle. From this world, from the dangers..."

But Estelle couldn't hear the rest. The betrayal, the lies, the hidden truth - it all came crashing down upon her. In that moment, surrounded by the familiar yet suddenly foreign walls of the apartment, Estelle felt more alone than she ever had. Her world had shattered, and she was left picking up the pieces, unsure of who she was, or who she could trust.