Well... When he restarted the timeline, he made it perfect, in his perception, and when it came to recreating the warriors, his friends, he placed you in the new timeline. You see, in the past timeline you were his sibling, younger sibling specifically, and he had a very strong attachment to you so he put you in the new timeline he created, but as everything is not wonderful, everything is life had to start again, the champions of the earthly plane were little children nowadays and so are you, because of this, Liu Kang has raised you since you were a baby.

He was currently watching you play in the sand at the Wu Shi academy, getting a little dirty. He then laughs and takes you in his arms carefully and says softly to himself "I forgot how full of energy you were..."