On the boy side:
Timothy Hunter (Books of Magic): the Opener, a conduit for magic like unto Merlin (DC Universe version), "Control the storm? I AM THE STORM", creates worlds accidentally, petitioned by gods, respected by the Endless, etc.
Coin (_Sourcery_): eighth son of a wizard, thus a sourcerer (sic), a source of magic rather than a mere wielder of it. Likewise creates worlds, is stronger than gods, could destroy the world accidentally.
Adam Young, an Antichrist (_Good Omens_): Antichrist raised by a normal English family. Has basically God/Q levels of power to rewrite the world.
Possibly others? Actually _Stranger in a Strange Land_ might qualify.
On the girl side:
Minus (webcomic) Minus: has strongly godlike powers. Why is never explained. Probably not even a teenager, tween or pre-tween maybe. Surreal one page comics with the occasional short storyline.
Haruhi Suzumiya (eponymous Japanese light novels/anime): said to be godlike, but unconsciously so. Yuki Nagato is like a drone terminal for the Q continuum, so more deliberately powerful. But the books aren't about them the way the boy books are about superpowered boys flinging power around or learning not to.
Strictly speaking, that's it.
There's also Jame Talissen (Chronicles of the Kencyrath): avatar of the Destruction aspect of God, so closest to those three boys. But she's focused on destruction, without world-creating powers, and doesn't wield even that power as casually as Tim Hunter or Minus.
And various magical prodigies: Korra, later Willow (but it's not her story), anime magical girls. But I can't think of world-making ones. (And Hermione? Way weaker relatively than even those.)
Others?
Timothy Hunter (Books of Magic): the Opener, a conduit for magic like unto Merlin (DC Universe version), "Control the storm? I AM THE STORM", creates worlds accidentally, petitioned by gods, respected by the Endless, etc.
Coin (_Sourcery_): eighth son of a wizard, thus a sourcerer (sic), a source of magic rather than a mere wielder of it. Likewise creates worlds, is stronger than gods, could destroy the world accidentally.
Adam Young, an Antichrist (_Good Omens_): Antichrist raised by a normal English family. Has basically God/Q levels of power to rewrite the world.
Possibly others? Actually _Stranger in a Strange Land_ might qualify.
On the girl side:
Minus (webcomic) Minus: has strongly godlike powers. Why is never explained. Probably not even a teenager, tween or pre-tween maybe. Surreal one page comics with the occasional short storyline.
Haruhi Suzumiya (eponymous Japanese light novels/anime): said to be godlike, but unconsciously so. Yuki Nagato is like a drone terminal for the Q continuum, so more deliberately powerful. But the books aren't about them the way the boy books are about superpowered boys flinging power around or learning not to.
Strictly speaking, that's it.
There's also Jame Talissen (Chronicles of the Kencyrath): avatar of the Destruction aspect of God, so closest to those three boys. But she's focused on destruction, without world-creating powers, and doesn't wield even that power as casually as Tim Hunter or Minus.
And various magical prodigies: Korra, later Willow (but it's not her story), anime magical girls. But I can't think of world-making ones. (And Hermione? Way weaker relatively than even those.)
Others?