For everyone, memories are like photographs that they could picture in their heads if they wanted to. The image of their experience and the faces of the people within it are naturally remembered by their brain.
However, in Watson's case, memories of his family were like fragrance. He could not picture them and recall them through visual images, as their faces and how they looked had been long taken out by Loki. It was like a fragrance that, even if he couldn't recall them, his senses would remind him that this was a feeling he had previously.
Watson remembered being excited to be sent to the academy, and it reminded him of his first admission to an academy a thousand years before.
Although he couldn't recall everything, his senses recall something that happened to him that day that caused him sadness or despair.
"Is this what the world tree doing?"
Ernesto panicked. He grabbed Watson's shoulder and the blue wolf shook his head.
