The Closed Box Theory
Inside the Hokage's building there is a room. This room contains boxes. One box for every ninja in the village, a place for them to store their most loved possessions safe from harm. Only the ninja in question has the ability to open their box and unless they leave instructions for what the village is to do with the box after their death, it is destroyed with out ever being opened. The exception to this rule is missing nins, where the Hokage forces the box open to inspect the contents.
The box was twenty centimetres length and breadth and ten in depth. The only difference was the Hokage's, which is an entire room. The Yondaime's room has been sealed and his last will and testament states that it should be left to the next Namikaze to become Hokage.
This is a tour trough the stories behind some of the items in some characters boxes.
What's in Narutos box?
Narutos box contains three very personal objects, the first is creased photograph of a team of 5 ABNU centred around a baby with whisker shaped slashes on his cheeks and mop of blond hair. The team are all wearing their masks and a few are covered in blood, the photo was taken shortly after the first assassination attempt on Naruto. A mob of fifty villagers backed up by ten chunin had tried to storm the apartment building where they were caring for the child, the ABNU were forced to kill all of them in a bloody slaughter, this is where Naruto gained his whisker scars as he saved one of the ABNU ninjas lives by pointing to the man behind the pretty lady in the fox mask. The said ABNU hadn't even bothered to look behind here but had instead thrown a kunai over her shoulder without looking, killing a Jonin that was using a shadow clone to sneak up behind her, she later identified the ninja who went missing two days later under mysterious circumstances. For saving her life she marked him as special by copying the whisker marks on her mask onto his face, naruto did not cry throughout the whole time the cuts were made and instead giggled as the picture was taken.
The second item was coupon for one free bowl of ramen at Ichiraku's ramen stall; it was not the fact that it was a ramen coupon that had caused naruto to keep the small piece of paper. It had been the first ever gift he had been given from Iruka. Naruto received it after naruto gave him his groceries that he had left behind in the store. It was a small gesture but it was the first time naruto had felt appreciated by any adult.
The last item was Sasuke's headband, which naruto is determined to return to him when he finely rejoins the village. As he does not know when this will be he has placed it in his box to keep it safe
What's in Anko's box?
The Special Jounin has only two items in her box, or more precisely one item and the remains of another.
The first was a sketch drawing of Anko as a Genin covered in her enemys blood, she had the biggest smile on her face as drew on the wall with blood off her kunai. It had been drawn by her teacher after a mission, only two weeks before there final trip to sea country. The mission had been a C-rank to remove a group of bandits from a village north of Konoha. It was after this fight that Orochimaru had taken her in his arms and whispered to her that he understood her like nobody else would, Anko had belived that this meant that he too lived in his own world of psychosis. While Orochimaru did indeed have his own complex about his own abilities and needed to be the greatest, he was only twisting her mind so that she would join him when the time came. Anko took the conversation to mean that he like her felt the need to cause pain, not just a mere physical need, but one deep within her soul. This was the moment that the snake sannin stopped being the only friend in her life and became her first, last and only true love. She felt her soul die when he left and from then on cursed him for leaving her in a village were no one understood her. Her psychosis spiralled out of control after he left, turning her from fractured to completely shattered.
The best example of this was the next item in the box. The decaying body of a cat. Anko had snatched it from the fire lord's garden before they left for sea country and had placed it in the box to see if it could survive till she got back.
Since she had got back to Konoha she had never had the box opened, so that she never had to see the grinning sketch of her painting happily with blood again. But also in a small way so she never had to explain to anyone what she was doing with a dead cat in her box.