"Possibly." Aziz answered. "A spirit that has escaped its summoner usually flees back from whence it came. But sometimes it hangs around in the physical world, for reasons known only to itself. The technical term for an uncontrolled being like this is ‘free spirit.’ Some of these spirits are playful and protective, but others are extremely dangerous. Lethal, even. And the only way to summon one is to learn its true name." Masaki glanced uneasily at the window. Outside, sunlight was shining through a break in the clouds. It slanted into the shop, painting scrollwork shadows on the floor. "Could such a spirit get through your window, Aziz?"