User blog comment:ShonenChicoBoy/CoD Application Blog/@comment-2185383-20170524004521

(Shamelessly c/ped from the review forums)

Kimi Uchiha

How she got to the current timeline basically goes the same way it did for Rebirth. Her Mangekyou tech (Amenojurō: Time Wheel) caused her to become stuck in time until the start of the project. This happened while she attempted to flee/fight off the pursuing Kumo ANBU.