- Achilles' Heel: Literal, since you can paint Achilles
- The Cape: You can paint one.
- Cold-Blooded Torture: In an attempt to get knowledge.
- Convection Schmonvection: Justified. If the artist didn't think of it, it didn't happen.
- Flaw Exploitation: They know that Kevin will attend a con in person, for the adoring fans.
- Fractured Fairy Tale: Penny and Achilles do not follow their own legend. Fortunately.
- Genre Savvy: Deducing Red's Achilles' Heel. (Though fortunately not all the legends of Achilles are accurate)
- Magical Girlfriend: Much to his horror
- Squick: In universe, on discovering the actual legend of Achilles and Penthesilea, which fortunately, the painted characters do not follow. Achilles killed Penthesilea. And raped her corpse.