Seeing A Friendly Face
The person who called the rescuers is none other than one Carey Linnell. She was there by the cage and holding it open. Upon seeing her, Rain did not go into the cage and just go on all fours before sliding under Carey’s arms.
Familiar Face
It seemed as if Rain had already known Carey and trusted her, allowing her to pet her. She even went up to her willingly, as if she knew that Carey was the one to call for help in the first place.