Sirius Blake, born with red eyes and white hair, carries the soul of a modern man from another world. Once a streamer and self-taught fighter, he awakens in the Kingdom of Lucis as the nephew of Cor Leonis, the Immortal. With his parents lost and only fragments of his past life to guide him, Sirius grows under relentless training, his hidden talents sharpening in silence.

While Crown Prince Noctis and his companions prepare to inherit their destinies, Sirius walks a path unseen. He becomes the youngest leader of the Shadow Guard, Lucis’ secret circle of protectors who bleed in silence for the Crown. Alongside his four operatives—Kael the Phantom Blade, Rhea the Veil, Darius the Bulwark, and Lyra the Silent Fang—Sirius defends the kingdom from threats that never reach the light.

Yet Sirius bears more than skill. A subtle system overlays his existence: experience hidden until sleep, vitality felt as exhaustion or strength, and loot revealed only at day’s end. It offers no quests, no guidance—only a mirror of his struggle. Every failure fuels his growth; every battle leaves echoes that shape his style.

As war looms with the Niflheim Empire and the Astrals stir in their shrines, Sirius must balance two lives: the loyal protector sworn to Lucis, and the reincarnated soul who knows the tragedy this world is fated to endure. Caught between destiny and anomaly, his blade may tip the balance of Eos itself.

Disclaimer

Final Fantasy XV: Shadow Blade is a fan-made novel inspired by Final Fantasy XV, a game developed and published by Square Enix Co., Ltd.
All original Final Fantasy XV characters, settings, and concepts are the intellectual property of Square Enix.
This work is non-commercial and created purely for storytelling and fan appreciation purposes.

Thank you so much for joining me on this journey into Final Fantasy XV: Shadow Blade. I've chosen to share the entire first book in one upload so you can experience the story as a whole, from beginning to end, without interruption. Book 2 is already underway, and I'm excited to bring you deeper into Sirius' path, his struggles, and the secrets that shape his destiny. Your support and encouragement mean the world, and I hope you enjoy stepping into the shadows of Lucis alongside these characters.


Stay tuned for Book 2 — where new bonds will be tested, darker truths will rise, and Sirius' hidden potential will begin to awaken.


Chapter 22 - Book 2 soon!!