Kora was dragged out of her room by Dana when she found out that the girl was budding and didn't want to be seen because of her look. Dana didn't think there was anything wrong with the way Kora look even if she hadn't seen the girl since she woke up. She had heard from Ezra about the change in Kora and she was rather excited to see it than think it weird.
But Kora seems to think otherwise. Even after she spoke with Lazarus she still wasn't satisfied with it and chose to stay indoors avoiding everyone, perhaps by tomorrow it will go away and she will be herself again.
Dana just could not understand why Kora was suddenly conscious about her looks when she had never cared about them before. The moment Dana entered the room which was now dark because Kora had pulled down the curtains and shut the windows and then turned off the lights, she was awestruck by the sight before her. Kora's hair and eyes were glowing in the dark, seeing the reflection of her eyes in the mirror.