Chapter Text
The first synesthetic experience occurred not long after he arrived on Earth, just after he had moved into a cave.
It was the beginning of summer in Green Hill. The overwhelming green swept over every hill like an ocean wave, and under the hot wind, vast expanses of green rippled, with sunlight scattering into shimmering gold reflections. The air carried the mingled scents of sun-dried trees and damp earth.
With just a slight sniff, Sonic knew Green Hill was awakening—the earth gently heaved beneath his feet, emitting a rhythmic breath, while the distant wind rustled the leaves, sounding like an eager call to his ears. His feet twitched on the soil, his arms swayed in the wind, and his eyes darted eagerly in their sockets—every subtle physical reaction reflected a intense craving for motion—for speed, wind, and freedom.
He crouched slightly, placing his hands steadily on the ground beside his front feet.
The soil emitted a joyful crunch, as if the earth had been waiting for his touch. His body arched slightly, his eyes focused intently ahead, compressing the layered trees into broad blocks of green, then shrinking them further until only a gleaming point remained in his vision.
Starting from his feet, then to his quills, and finally to his eyes, blue lightning crackled and danced within, piercing the forest's silence.
He pushed forward, forward, until the extreme point—and then, a leaf drifting leisurely downward suddenly shot into the sky like a bouncing ball. Intense energy swept through the forest, accompanied by a sharp roar.
Sonic's blue form blurred into a flash, kicking up clouds of dust in his wake, with only swirling leaves in the air as proof that a blue hedgehog had once run there.
The wind slammed fiercely against his face, pushing through his fur. All external sounds faded, leaving only the roaring wind. The surroundings blurred, contracted, and simplified into a continuous stream of monochromatic blocks. The ground beneath his feet gradually faded, turning into flowing silk. His body moved with such natural coordination at high speed—his feet spun and leaped like a ballet dancer's, dodging obstructive branches and stones, while his arms waved flexibly like a conductor's, shifting his center of gravity in tune with his turns.
It was almost unconscious, as if his body was born to perform a ballroom dance with nature.
Sonic loved the feeling of the wild wind slapping against his quills—they stretched and grew in the direction of the wind, all pointing uniformly where the wind went.
This was his favorite moment, not only because racing with the gale brought passion and freedom, but also because, in this moment, all fear of loneliness, all nostalgia for the past, all confusion about the future, and all sorrow of homelessness were released from him, carried away by the wind and left far behind, never to catch up again. In this moment, his soul sank into a wonderful emptiness.
His feet came to a stop at the edge of a cliff.
It was an open grassland, where the breeze rustled the soft grass blades, creating a soothing sound. A lone tree stood by the edge, gazing down at the distant town below the cliff. It was equally far from this cliff, this tree, and this lonely blue hedgehog.
Sonic leaned back against the tree trunk and settled onto the grass, which seemed to embrace him from below.
His emerald-green eyes widened, gazing with near obsession at the vast, boundless sky— blue, clear, and infinite, with a few clouds drifting slowly across.
The sun hanging in the sky continuously radiated heat onto the earth, and the summer sunlight filtered through the gaps in the leaves above, warming Sonic's blue fur. The wind came and went in rhythms, caressing his body rhythmically.
Lying in this grassland felt like receiving an endless embrace from nature.
Yet, in this warm moment, a sudden chill swept across the back of his neck.
Then, his consciousness was abruptly dragged down, plunged into a silent darkness.
He couldn't see, couldn't move, couldn't cry out—only the cold sound of water and the faint hum of machinery surrounded him.
His entire body felt as if suspended in a thick liquid, floating mid-air. His heart filled with an unfamiliar emotion, composed of immense anger, sorrow, and fearful confusion, almost overwhelming his soul.
It lasted for a while, but to Sonic, it felt like an eternity.
Finally, he emerged from the dark waters, regaining sensation in his original body. He let out an exaggerated scream, springing up from the ground abruptly.
"Geez, what the heck?" Sonic muttered, patting his chest with lingering fear.
His heart beat weakly in his chest, and he had never felt the sunlight so dearly beloved.
"Don't let that happen again." He didn't know whom he was whispering to. Unfortunately, his prayer was destined to go unanswered.
Sonic didn't know it yet—this was only the beginning.