Hokage Office.
Staring at the Fourth Hokage's specially made kunai and the Shinigami mask from the Uzumaki Clan on the desk, Tsunade's expression grew grave. "Did you find all of these on the battlefield?"
"Yes!"
Kakashi nodded.
Tsunade said, "Tell us what you think."
Kakashi considered for a moment before answering. "I consulted the Sealing Team and confirmed it personally. This Shinigami mask was originally enshrined in the Uzumaki Clan's storehouse near the village. Someone took it within the last two days, and it was left behind on the battlefield."
The Third stepped forward and picked up the Shinigami mask, examining it. "That's right. This is a Shinigami mask made by the Uzumaki Clan, and it corresponds to the Shinigami who made a contract in the 'Reaper Death Seal' forbidden jutsu scroll in the village archives!"
Tsunade asked, "What does this mask do?"
The Third shook his head.
Clearly, the Third didn't know what the Shinigami mask did. As far as he was concerned, the Uzumaki Clan's 'Reaper Death Seal' was an unsolvable jutsu.
Setting the mask down, the Third picked up the Fourth Hokage's specially made kunai and ran his fingers over the words 'Sword of Ninja Love' engraved on it. "This was his kunai!"
The "him" the Third referred to was undoubtedly the Fourth Hokage.
Kakashi nodded slightly. "I just went to the Ninja Tool Repository. Minato-sensei's scroll of ninja tools is gone!"
"Could the Fourth Hokage have..." Tsunade started, then shook her head. "How could that be? He used the 'Reaper Death Seal,' and his soul was sealed inside the Shinigami. Did someone rescue his soul from the Shinigami?"
Kakashi said, "If all they did was rescue Minato-sensei's soul, they couldn't have left this 'Sword of Ninja Love' behind on the battlefield. So I suspect someone used