Mu Jiuzhou
These people recognizing him as the "good for nothing" really tells us that this MC's looks have not changed, which is really peculiar. Don't you think that a person's look would change after 6 years. He also joined the military and for sure he received a tremendous amount of training that would've definitely changed his physique. Which would result in toner or maybe bulkier muscles, and also make him grow a few inches.