Full name: Πολυύμνια Ἑλικώντης
Hobbies: Dancing, costume design, meditation, gardening
Summons: Scythe, axe, illusions
Favorite food: Dishes made from her garden plants
Dislikes: Loud noises, impulsiveness, not being taken seriously

Polly tends to be reserved, analytical and pensive. She's probably the smartest of the younger muses, but she also has a faintly arrogant, cynical streak at times. She's good at strategies and planning, but not so good in spontaneous situations. She can summon temporary, intangible illusions and even cloak herself briefly. For reasons unknown, Polly tends to avoid Earth, never visiting unless it's on assignment. Of the five younger muses, she is the most experienced, and serves as their leader when the elder four are away.