Rewrite

Marie: " it has been a long time, Ban."

Ban: (with a smile) " it has been seven years, mom."

Jun'ichirou: " you grew up to be a man, son."

Ban: " it's because of my friends and the persons you surrounded me with, dad."

Marie: " we've been watching over you for all those years."

Ban: " and I'm thankful for this."

Arata: " Ban-san, it has been twenty minutes since you entered the cave."

Ban: " already twenty minutes!"

Jun'ichirou: " to the point Ban, what brings you here?"

Ban took the Sasayaki out and said.

Ban: " this is what brought me. Dad, I can't use it!"

Jun'ichirou smiled and said.

Jun'ichirou: " of course you can't. This sword is meant to protect you, not to be used by you."

Ban's eyes widened in surprise.

Ban: " it wasn't meant to be used by me! But, you entrusted me with it, dad!"

Jun'ichirou: " yes, I entrusted it to you because the time will come when you will find someone who would do anything, just to protect you. Then, you will be the one who will give him this sword."

Ban: " but I thought it was supposed to be mine!?"

Jun'ichirou: " I remember that I told you thirteen years ago that I have a sword meant to protect you."

Ban: " so I can't use it."

Jun'ichirou: " no, and I think you know about the Sasayaki's story, right?"

Arata: " Ban-san, it has been three hours..."

Ban snapped but quickly answered.

Ban: " yes, the reason why he was called the silent killer."

Jun'ichirou: " the Sasayaki doesn't give it's blade to anyone. So you should find that one yourself."

Ban: " I should find the one who will protect me myself? How?"

Jun'ichirou: " that is a question you're the only one who is able to find its answer."

Ban: " well then, all I need is to find someone who is willing to protect me right?"

Jun'ichirou: " I'm afraid it's not that simple. The Sasayaki must be used by someone with a pure soul and kind heart."

Marie: " it's very hard to find someone with pure soul and kind heart, and he is willing to protect you at the same time."

Ban: " I see."

Arata: " Ban-san, it's almost sunset, aren't you done talking with them yet!"

Jun'ichirou: " I think it's time to go, Ban."

Ban: " wait, dad, there is something I wanted to ask you."

Jun'ichirou: " what?"

Ban's lips shook for a second then said.

Ban: " who killed you?"

The two spirits frowned at the question. They exchanged looks before looking at Ban again.

Marie: " what do you mean?"

Ban: " I mean who is the one who made our people turn on you? I know you know him or her."

Jun'ichirou: " why are you asking for that, Ban?"

Ban said nothing but kept looking down. The spirit then yelled.