@Lmpkio: The addition is fine, but, well...
The premise you have right now is really off the mark. The RE universe wouldn't have had access to something of your character's nature, leaving the only feasible place she could have come from being the way everyone else entered: a portal from the Astral Plane, where she'd have been debriefed on the entire situation from the start.
Furthermore, the initial zombie horde's basically donezo, and the group of lickers is almost dealt with, so there's no need to go full airstrike mode on them right now.
Edit: Also, if they've basically cleaned up shop, then they don't exactly require any major assistance, don'tcha think?