We found Ran, today, with her face as white as the snow outside, and she looked almost as if she were going to faint. When we asked her what was the matter and she gave her answer. Naturally, we were in disbelief and asked, "Yukari did WHAT?!" She explained to us slowly that Yukari managed to open a gap to the past and save some of those lost, the which included a toddler Marisa, Flandre, a kid Sakuya, Remilia, a baby Sanae, and a toddler Alice, also Cirno. We were promted to ask if Yukari died as a result, to which she responded, "No, but she's exhausted." In bringing them from the past, their demises will never have happened. Of course, that begged the question as to how many we were to feed. Of course, even though their deaths had never happened, however, what happened to the world cannot be undone and rebuilding Gensokyo could very well prove fatal for Yukari. She's done what she's wanted to and she wasn't going to do any more.
Since she's bent the borders of time, I do wish she could have at least brought Eirin or Keine or Reisin back. Of course, Keine died of natural causes and bringing Eirin back would very well wipe her fron existance, being that her wish to die overrode her immortality, so bringing her back from the dead via bending the time border could very well erase her from existance. As for Reisin, maybe, it could be that doing so could prove fatal for her. I suppose Yukari did basically what her abilities allowed her to do and she wanted to give someone a new chance at life, without blowing up the fabric of the universe and the space time continuum.
On a humorous note, it seems Marisa has gravitated towards Ran, seeing her as "Mommy" and won't let go.
"Ran-mommie and Ren-daddie!"
"Yes, Chen?"
"Two things~!"
"Okay."
"I love you and Reimu bit me again."