You'll have to forgive me if I don't sit.

[Not an Archer habit. He still follows behind.]

Without a proper source of mana, I cannot exist. Those are the rules. One of my class skills allows me to linger as long as I have my own mana, which is fortunate because any other Servant would have vanished within an hour. I have a minimum of two days and a maximum of however long I can string out what I have.