Evil Lawyer Joke: When the Cures learn that Aya is studying to be a lawyer, they're quick to become suspicious of her. Naturally, Kumiko theorizes through Insane Troll Logic that she's a spy for Black Hole. In a subversion, Aya is revealed to be more heroic than she let on.
Cure Capricorn: I thought all lawyers were evil? Aya: I'm not like 99% of them.
Good All Along: Aya is set up as one of the villains, but within a few episodes of her first appearance it's quite apparent that she isn't as shady as the story had you believe up to that point.
Thirteen Is Unlucky: Episode 13 naturally runs with this trope, to the point where it takes place on a Friday the 13th. Obviously, this does not bode well for Iruka, who is already a magnet of bad luck as it is.