It is not that Sawada Tsunayoshi is as innocent, naïve, and timid as most people thought.
He is, in fact, quite smart and knows many thing that normal people don't and wasn't supposed to know.
In his past life, he had been so selfish and naive that he caused a city's destruction by his own hands. And he was so selfish that he don't want to admit it, so selfish that his friends leave him all together. He also steals a person life and no matter that he doesn't even know it nor want it, he still steals that person's life.
He was a murderer and a thief. He was so bothered by this fact that even in this life he could not stop asking for forgiveness, after all if there is something he can do to someone else then its forgive them for what they have done.
He also doesn't deserve anything, he forgave people because he can't be forgiven but he doesn't want other people to be like him. After all they deserve more than him, he was lower than them and they are higher, more respected and stronger than him.
That's why he doesn't want Gokudera to protect him, nor Yamamoto to throw his life for him. Because he doesn't deserve it, a murderer, killers like him….
Maybe Reborn had notice it, his reflex that makes him dodge the baby's highly dangerous training method. Or maybe Reborn had thought it as his hyper intuition? Either way works with him.
His reflexes that comes from fighting all those wild animals, all those soldiers and mostly all the Generals. He was lucky Reborn trains him in hand to hand combat, had it been swords, he wouldn't know how to explains where did he learns the basic and theories.
After all, the destruction of Akzeriuth and the deaths of all it people is his fault. No matter what his friends said, it would always come back to haunt him.
And Luke is still haunted by nightmares of Akzeriuth's destruction even in his after life, after being reincarnated into Sawada Tsunayoshi.
Its not like Tsuna want to die or something like that, he still wants to live his live to the fullest, and it's not like he thought himself as lower than dirt or doesn't deserve to have a wish sometimes. Its just he knows he doesn't deserve much and only ask for what he desperately needs.
He did knows that he somewhat deserve and wants to live after the incident atop the Tower of Rem, but still most people deserve it more than him. So if his death could save another, he will probably sacrifice himself there and then.
After all, he can't just get rid of his inferiority complex that fast, right?
A/n : Aah, dunno what makes me write this but enjoy and tell me what you think about it! This is somewhat inspired by Identity, a bleach story by Ayleia. Oh man, I can't believe I write that much…angst and somewhat self-loathing! But again, this is the oh-so-cute-with-his-short-hair Replica Luke! And maybe if I'm creative enough I will search for an Asch for our lovely Luke! aah, the lovely and awesome Tales Of Abyss! You should be happy I make Tsuna-chan past life is Luke! The first choice is Raito Yagami buuut then would be soo much evil genius scheme that will totally ruined Tsu-chan's image so I will save Raito for… maybe Reborn? Or even Mukuro!?