Sgt. Frog Episode 133

A strange girl named Alisa Southerncross suddenly kidnaps Fuyuki Hinata during the Halloween party, thus Koyuki Azumaya and Momoka Nishizawa chase her down. Alisa's cat-ear-shaped headband is able to shapeshift into anything, which she uses to grow gorgon-like snakes and turn them both into stone. However, this backfires when she's tricked into looking at a mirror and petrifying herself, subsequently freeing the other two.