SPOILERS ON HOW To SAVE JOSH AND JESSICA, Dont read ahead if you dont wanna know how to do it.
Yeah, i think she is the hardest to figure out honestly, im not 100% sure if there are other ways to save her but how i did it was, after she is taken (window) make sure you hit all the QTEs while Mike chases her down, after the cage falls, (make sure she still has her jaw, if She doesnt she will be dead) she will seem dead but she will actually be alive. in Episode 10 after the Wendigo finds you, make sure to hide and stand still, if you try to run (which seems obvious she is in no condition of doing so) he will catch you and rip you a new one LOL
For those wondering how to save josh i think i figured it out, its clue based, you have to pick up the notebook from the twins in episode 10 by the mill. this will trigger the Wendigo to take Josh with her instead of killing him on the spot...