One of the harpies that plans to kidnap David Merlin and his assistant, Claudia. Both she and her partner, Ephesos, belive in a prophecy that "whoever forms an alliance with the two earthling spellbinders will come to rule Otherworld."She appears in the episode "As If By Magic".
- Ptenos holds a "Nastiest Harpy Competition" between her and Ephesos.
- She and Ephesos are one of the few harpies with dark blue hair and wings.
- Ptenos has a unique hair stlye: her hair points upward and then falls to her shoulder.