Ultraman Ace: S1 E28 - Goodbye Yuko, Sister Of The Moon Ultraman Ace

Yuko, who has been acting erratically ever since the last full moon, shows an extreme interest in defeating Terrible-Monster Lunaticks. Hokuto is puzzled by her behavior, but this terrible-monster is the main culprit in turning the moon into a death star. Then, Yuko shows Hokuto what she really is...