Protagonist: Lin Yue (Before time travel, he was a member of Naruto's in-depth research party). After time travel, he became the Konoha civilian orphan "Morikawa Goe". He has no blood inheritance limit and comes with a "Ninja World Information Database" golden finger - he can accurately recall Naruto's full plot details, character relationships and undisclosed settings, but he cannot directly obtain power and needs to rely on his own actions to transform information into an advantage.
