For this bizarre extra(?) thing, 2nd world Uryuu is living with 3rd world Nishijima while 3rd world Uryuu is still a terrorist they're trying to stop? How does 3rd world Nishijima just accept this?
The more I think about it, the more I like the ending.
But one thing that has me wondering is that Yuno's parents were definitely abusive (feeding her tatami straws and caging her), but out of nowhere, they became loving and caring parents willing to sacrifice their lives for her.