|First mentioned||Fight or Flight|
|Potential ability||Muscle mimicry|
At the Dawsons' home, Micah shows Monica a copy of 9th Wonders!, Issue #10. He points to St. Joan on the cover, and tells Monica that Joan has a power similar to hers: she is a muscle mimic--a copycat.
When Monica disguises herself in a black hood to break into someone's house and retrieve Micah's comics and D.L.'s medal, Micah claims that she is St. Joan. Later, when hiding from a group of arsonists by bracing herself against a ceiling, Monica is revealed when the St. Joan issue of 9th Wonders! falls from the backpack.
Dennis Collins has a St. Joan poster in his room.
- Micah identifies St. Joan as having the power of muscle mimicry.
- It is unknown whether Joan exists, or whether she is simply Isaac's creation. It should be noted, however, that most characters from 9th Wonders! exist outside of the comic book as well.
- St. Joan is pictured on the cover of 9th Wonders! wielding a kris dagger and a crossbow. A similar kris is seen in the Company's vault in Powerless.
- According to the weekly trivia game at NBC.com, St. Joan is Monica.
- The subtitle of Rebellion, Part 7 is The Liberation of St. Joan.
Dennis Collins has a poster of St. Joan in his bedroom.
Please refer to Theory:St. Joan for fan-created theories and other speculation.