2 reasons Lena could be rotting
I've read a few of the posts, some debates wondering if she's actually dead, or has been dead the whole time, or switched places, and while I think they're all some pretty good theories what about the twin theory? You know, that whole "What happens to one twin can be felt by the other" thing?
So Lena was thrown by her father and normally she would have healed, but because her link, her twin, is now back and rotting away then that could be why her wound is rotting and not healing. It could be as simple as that.
My second theory is coincidence. What if when (mind you I haven't seen this in about 6mo -1yr, so correct me if I am wrong!) Lena's father threw her, she died but no one noticed because when she came back so did everyone else? I don't remember if he had hit her in the past or if it was something really recent. If it was in the past, then nvm!
"Everything could've been anything else, and it would have just as much meaning."