What so you're expecting the girl to turn around and eat/rape Tae? Honestly?
All things considered, Oku has kept Tae alive this long, through seemingly impossible situations.
As noted, the girl doesn't come accross as dangerous. she probably doesn't even have the capacity to understand...
I don't believe Tae is in any danger from the girl. It's likely that the young girl see's Tae as a doll, or a Pet. She probably doesn't have the capacity to understand that the other Aliens want the humans dead.
I believe this because if she wanted Tae dead she could of killed her already...
