Harry (Addams)
Morticia looked up as Pubert ran into the room. "Mama! Mama! There's a strange boy in Wednesday's trap!" he called out, mustache quivering with barely contained glee. She looked up, following her youngest son as he ran to where he came. "Oh? And who may this strange boy be?" she glided into Wednesday's torture chamber, only to stop in surprise at the sight of a small, lithe boy in a net hanging from the air, reading a book as if there weren't a pair of spikes underneath him ready to impale him. A black and green backpack acted as a pillow for him. "Well, well, well. Who do we have here?" she asked, circling the trap. The boy closed the book and it disappeared in a flash of green light. "Harry, ma'am. Sorry for the intrusion. I'm an inter dimensional hopper," bright emerald green eyes stared at her as his head titled, then disappeared with a flash of green light only reappear by the floor. Wednesday ran up to him. "Show me how you did that," she demanded. The boy shrugged. "Okay. But I'm gonna warn you now: I'm gonna disappear after my birthday. I always do," Morticia allowed herself a thin smile. "Oh? Come and tell us more,"
--
While Harry is a natural teacher, with infinite patience, it turns out trying to teach Wednesday how to teleport is more than a bit difficult. She has magic of course, but it's vastly different from his magic or any of the other magic he knows and has experienced. Still, they both manage to get to the point where Wednesday can flash in and out of existence for short periods of time, a cloud of black smoke in her wake. She uses it to get an advantage on Puberty's uncanny ability to know where his siblings are at all times.
Harry spends most of his time in the library, either studying or fencing Gomez. He's rusty with his sword, but he has almost perfect aim with just about every gun given to him, including a modified machine gun sniper. There's no school to go to, but he doesn't want to lose the things he learned at Camp Half Blood. He commandeers a third notebook and covers it with Ancient Greek and modern Latin. He also goes over his Dauntless notes, and does a few math problems he made up for himself on the fly. Uncle Fester and Pugsley are there for science, and Puburty's there for history- even though he usually unwillingly gives it out. In exchange, Harry teaches him how to swear in Ancient Greek, and the few Persian phrases he knows just for the fun of it.
This time, both parties are well prepared as Harry says goodbye, his bottomless backpack filled with even more things. He steps out of the manor outside, and disappears.