"The troll is in the ladies' restroom, young master." "Let me guess, it's male?" "Indeed, young master." - In which Harry creates his own AI and throws Hogwarts into chaos, Tony discovers he is the father of a genius kid, and Jarvis gets a new best friend.

Once upon a blue moon, a soul managed to escape death's cold grip and descended back onto the mortal plane. Tobirama's duty might not be as done as he thought - but it's pretty hard to change things when you have been reduced to a ghost. Luckily enough there just happens to be a blond child who seems so similar to his beloved brother. (AU, NoPairing, NoRomance)