What if it is a real soldier who’s asking for money to come home from deployment, and they did a video chat, sent military pics, wore his uniform, and still said that he has to pay for his leave?

You do not get leave while on deployment they get paid a bonus for being deployed. They have access to their money at all times. If they can contact you they can get their money. Please save yourself some heartache and drop them now if they are asking for money they are not real.