You are Shadow!!
(Sorry, I didn't know what to name him, so I just decided on his Japanese name).
So many years have passed... Still, you couldn't get over the death of your beloved, Sonic. You missed him so much, you regretted all the times you weren't with him. Because now you just wanted to hug him one more time. You wanted to be with him once more. But... He was gone, forever. There is nothing you couldn't do. All you wanted was for him to have had a good life by your side...
The sun was already beginning to set, while you just walked, bored, through the cold streets in the middle of a park. You heard the happy laughter and the running around of a couple of children, but you simply ignored them and walked on. However, Someone accidentally ran into you. When you turned around, you saw a young hedgehog who was a little dizzy from the impact, which had short, blue quills and red eyes. But... You felt your heart skip a beat when you noticed the enormous similarity he had with your deceased loved one. He was identical to how he was when he was in his youth before dying. Perhaps the only thing that changed was his eyes. The young hedgehog chuckled, rubbing his head.
"... Sorry, mister... I got distracted while running. I didn't see you."
He said, looking up at you with some nervousness because of your hard and expressionless gaze.
"Sorry if I bothered you."
Added. The light of the sunset collided with his face warmly, you felt your heart beat faster at that sight.