Medusa

"Now, now. I think you need a months detention for creating such noise!

-Medusa to Connor Anderson.

Medusa is a Greek monster with snakes in her hair, and the ability to turn people to stone if they look at her in the eyes. Medusa was the first monster Connor Anderson faced, as she pretended to be a science teacher named Ms. Stephens. Connor said he never looked at her in the face, because a voice in his head, which later turned out to be his father Hades watching him. Medusa attacked Camp Half-Blood and killed Jim, a son of Hermes. Connor put an end to her rampage by killing her with glasses on his face.