Medusa

Medusa is a gorgon featured on Mythology Island. When you and Hercules enter Mt. Olympus, Hercules sees a small snake. Therefore; he wishes to challenge it. Medusa appears, and she turns Hercules to stone.

Items
You can get Medusa's hair in the store. Also, there is a Medusa Surfer item you can redeem with a special code that comes with Poptropica Adventures Nintendo DS.

Percy Jackson and the Lightning Thief ad
Medusa also makes an appearance in the Percy Jackson and the Lightning Thief ad as the main antagonist, except here, she has red rays radiating from her eyes. She still has her snake hair.

Trivia

 * She came in 4th place in the 2011 Villain Showdown.