Aliens live on the earth, and if they don't have special abilities, they need to hide their identities and live in seclusion. If he has a special ability, he can make himself have a legal identity and look like others, because now, whether renting a house, working or going to school, he must have a legal identity, and it must be filed by the police station, otherwise he can't move, and he can only live in a sparsely populated place without corresponding identity authentication.
Without legal status, it is almost impossible to live like an ordinary person. When renting a house, people will know that he has a problem as soon as they check the accounts. If you can't even get a bank card to work, the company must know that there is something wrong with him.