Anonymous asked, i have a headcannon that tsuna is unintentionally hardcore with certain mundane stuff like - dry swallowing pills, biting ice cream/popsicles, surviving headshots ect ect

Anonymous asked, what if like, in a meeting with other bosses tsuna just, eats an entire lemon in front of them. (reborn's suggestion, which tsuna thought was weird since like, eating lemons is pretty normal ? right?)

Tsuna had weird habits, Reborn realised. Like eating whole lemons. He would just take a lemon and bite into it, skin and all. And he wouldn't even flinch! Just chew on it with a neutral expression, as if the lemon wasn't sour at all.

"Isn't it sour?" Reborn asked once, staring at Tsuna devour the (whole!) lemon in horrified awe. Tsuna blinked and looked down at Reborn, look of mild bewilderment on his face.

"Of course it is, Reborn. It's a lemon." Tsuna finished off the lemon he was holding and reached out to take another. Reborn dropped the subject, looking away.

There were just some things people would always feel uncomfortable seeing.

-o-

Reborn successfully put the lemon incidents at the back of his mind until a few years later, when it was time for Tsuna's first meeting with a few of the mafia bosses that were only loosely affiliated with Vongola. It was no doubt that they didn't respect Tsuna for Vongola Decimo or not, Tsuna was still a young newcomer into the mafia world. As Reborn taught about ways to give his student an edge, a fruit basket caught his eye.

"…"

-o-

Tsuna was stopped before he entered the meeting room. "Reborn?"

"Here you go, Tsuna." Reborn passed him a basket full of lemons. "Enjoy."

Tsuna eyed the basket warily. "Not that I'm not grateful, Reborn," he said slowly, "but you rarely give things to me out of the goodness of your heart. What's your motive?"

"I want you to eat this in the meeting whenever you feel like it. Personal reason," Reborn said. It made Tsuna relax. Reborn was probably doing this for his own amusement, and Tsuna eating lemons would somehow contribute to that. It made sense.

"Alright Reborn." It's not like Tsuna was losing anything, anyway. He liked lemons.

-o-

"Ah, so the Vongola Decimo is finally here," one of the mafia bosses said, a hint of disdain in his tone. Tsuna didn't notice, more preoccupied with deciding which lemon he should eat first.

"Ah yes, we can begin the meeting now," Tsuna said distractedly as he took a lemon out of the basket, smiling. And then, without any sort of hesitation whatsoever, he took a big bite out of it.

The room went silent.

Confused, Tsuna looked up to see everyone staring at him with varying and mixed expressions on their faces. "Um, please begin? Don't mind me, I just like lemons." A pause. "Would you like some?"

"N-no… It's fine, Decimo," another boss stuttered out. Tsuna shrugged.

"More for me then."

Throughout the course of the meeting, Tsuna steadily polished off the basket of lemons. The other mafia bosses grew more and more horrified and, for some, nauseous.

After the meeting, they would go on to tell the other mafia families "The Vongola Decimo is not to be trifled with" because who else can eat a lemon without flinching but truly hardcore people?

Tsuna remained blissfully ignorant. And continued to enjoy his lemons.

Other things that happen include

Anon says, "I imagine that the whole 'eating lemons thing' becomes something that anyone new to seeing the Decimo must witness at least once. it is an unwritten law in Vongola because everyone likes to see the varying reactions and Tsuna stays blissfully unaware"

And

Cielo1207 says, "I bet Tsuna is so mundane hardcore, he once stepped on a lego block. And that's it. He just removed it and went on his merry way, eating a lemon. Hardcore."