Tsuna (2)
The first time little Tsuna tripped on his stuffed carrot, he set his stuffed fish (a present from a certain missing man) ablaze.
Nana recognised the signs immediately.
It was somewhat a secret but her family had always been somewhat fire-aligned. As in; miraculously-setting-stuff-on-fire-according-to-their-whims-aligned. He great great great grandfather had been a notorious arsonist after all, and even she had a phase somewhere in high school (there was a reason the Hibaris went out of their way to ensure the warehouse district on the outskirts of Namimori were devoid of combustibles).
What she didn't know, and what Tsuna later was told, was that Nana Kasai was a descendant of one of those alien existences that came and gifted the earth with the precious artifacts that kept the world intact. Unlike Sepira who could see the future, her ancestor was the originator and very embodiment of flames; both real and willed.
The power had, or course, diluted over the course of many centuries, which was why Nana was rather surprised when her little baby boy set his silly fish toy aflame and proceeded to giggle and try to put it in his mouth.
Nana first lit a candle when she was twelve, and really, the ability was more a party trick than anything else -unless, of course, you were smart about it (recalling the warehouse incident, Nana felt a nostalgic thrill down her spine).
Tsuna hiccupped, a plume of smoke coming out of his mouth and waved his flaming toy up at his mama.
Nana smiled as she took the toy and willed the flames out, always so much easier than lighting one, unlike her famous arsonist-grandfather whose inclination to setting fires really didn't translate into putting them out. It wasn't salvageable, but Tsuna never liked the toy anyway. But it seemed she would have to somehow teach her boy some control, lest he unsuspectingly hurt someone.
It turned into an epic battle of wills; Tsuna's kidnapped Captain Carrot versus Adorable Puppy Dog Eyes. Many dolls were sacrificed; about five Barbies became little more than plastic goo, a number of toy robots were reduced to ashes, and a slinky was heated and turned into a colourful wire scribble sculpture. Nana never got her little Tsu-kun to stop setting fire to people, but she did manage to mitigate the effects so people wouldn't be harmed too badly.
(Fast forward a few years, and Hana would question what was with Tsuna adding fire to people's hair and he'd just look at her in confusion because how in the world would he remember what happened when he was two and stuffing his face with whatever his little hands could get hold of?)