"tsuna's kind" and you want to remain deserving of his kindness
"He won't do that" but he could āš½ first of all, and also very much will should it come to that
"He's understanding" right until he decides it's your turn to be understanding, even if he has to make you understand for it to stick
"He's forgiving" uh-huh, he IS. Unless āš½ he decides to go "a little murder" about it instead, so you know. Let's not take it too much for granted
Which is all to say, the only reason vongola gets away with making tsuna vongola decimo against his will is, in my humble opinion, because he's still only 14 years old. A literal kid, still so young and easily impressionable, easily made to doubt himself in the face of how much bigger than him the world can be, easily made to bear weights that aren't his to carry, like the inevitable collateral damage that'd come out of him fighting for his freedom and happiness.
But a grown-up tsuna? A tsuna who's had the time to grow into who he is, who already knows exactly the kind of fuckery he won't let slide? A tsuna who already knows how much of a natural he is at making people find out after they thought they could fuck around with him? Who already knows he's so good at it, they never even think to fuck around with him again? Lol. Lmao even.
Reborn takes one look at him and almost laughs right in front of him. Of course, he still goes on to tutor him to become vongola decimo. He couldn't possibly pass up the honor of being the one to finely tune the ticking time bomb of a boss vongola's demanding to have
