I think that in an ending where everyone survives, Emily is probably out of that friend group either by leaving or getting kicked out

Even before Josh’s prank and the wendigos showing up, she seems to be the least liked member of the group with Mike even complainign about her poor attitude earlier in the game. While the prank and the wendigos end up bringing a lot of the people there closer together like Matt and Jess, Mike and Jess, Mike and Sam, and Chris and Ashley, Emily’s relationships with the other characters are a lot easier to destroy than cultivate unlike the other characters. By the end of the game, she either ends up breaking up with Matt, or despising the hell out of Mike for pointing a handgun at her, or both even though it’s possible to have her get a good relationship with both of them, it’s extremely difficult and most playthroughs have her hating either pr both, and she also ends up hating Ashley too if she ends up getting bitten. Combine that with how she’s the most disliked person in the group and I see her either being kicked out due to the other people there being fed up with her or her leaving out of anger towards the group.