You are The Son and Daughter of Kiritsugu Emiya The heir to the Emiya line While your father the assassin went to assassinate his enemies you on the other hand are Homeschooled and over sheltered Only staying in home till your father comes and you are not aloud to explore the outside world if only with your father or at the age of 18 or older However you are still allowed to go out doors only closer to your house Your father only does that as he only fears that any of his enemies would get too close to you and does anything worse to you when he’s not around