Talk:Kagari Shiina/@comment-173.171.29.39-20171208051830/@comment-33498049-20180621170733

Spoilers: It was actually a metal Upa(pretty rare). It set off the metal detector and delayed Nakabachi, saving his life. In the Steins;Gate world line Okabe buys the metal Upa first, so Mayuri ends up with a green plastic one. When she loses it, and Kurisu takes it, Nakabachi takes it and isn’t delayed, dying with the paper/theory on that plane.