Besides, you're not 'saving her' in this non-cannon ending because once you turn off the game and stop playing Yuri and Natsuki cease to exist while Sayori, after becoming self-aware, gets puts her in the same nightmare Monika had to live through. You must be referring to the non-cannon ending cause the 'true ending' is the one where Sayori falls down the same rabbit hole Monika did and gets deleted to prevent the same fate from repeating itself, otherwise there'd be zero potential for the upcoming content given how drastically different the two endings are.
Unless you count the true ending of the orignial game.
Originally posted by The Unknown Writer:Some mods give you the ability to do so.