Girl group Dal Shabet's past member and weather forecaster Vicky revealed a photo taken with group Rainbow's Noeul.

Today, Vicky posted on her Twitter, "Rainbow blue. My pretty and nice sister. You'll do well~" along with a picture.

In the picture, Vicky and Noeul are smiling at the camera, revealing their friendship.

Noeul commented on this saying, "Fighting to my older sis as well! Time went by so fast yesterday."

Internet users who saw this commented, "Both are so pretty~," "They could really pass as sisters," and "They must be really close to be calling each other sisters."

Photo Credit: Vicky Twitter