Ultraman Mebius Episode 23

Marina and a man named Torii investigate disappearances caused by the sound of ocean waves far from the sea. It turns out the culprit is a time-warping monster that transports the two to the summer Marina's grandfather passed away, where she only remembers dreaming of an albino peacock. In the process, Marina learns the origins of her courage and its connections to Torii. (Source: TV Tropes)