Ambiguously Brown: Has olive skin, but also freckles and brunette hair. Though considering her Latina voice actress (America Ferrera) also has freckles, it's doesn't mean she's not supposed to be Latina.
Baleful Polymorph: Rani is transformed into a bat by mermaid song in the second book, with her consciousness trapped inside. By the end, the bat agrees to trade places with her, becoming a kind of Greek Chorus in her mind.
Alchemy: The main conflict of The Pirate Fairy kicks off when Zarina creates different kinds of pixie dust related to various fairy talents, using a speck of blue pixie dust as a base. She even refers to it as alchemy at the end of the movie.
Super Speed: In Fairy Haven and the Quest for the Wand, Vidia wishes to be able to fly as fast as she wants for as long as she wants. Although she has fun at first, she soon realizes there's no longer any challenge in flying and grows bored with flying altogether.
Star-Crossed Lovers/The Not-Love Interest: Periwinkle and Tinker Bell's relationship is even compared to an actual pair of star crossed lovers despite the two being sisters. Though, the actual starcrossed lovers in Secret of the Wings were Milori and Queen Clarion.
Genki Girl: Even moreso than Periwinkle; she seems to be on constant sugar high.
The Woman Wearing the Queenly Mask: In The Secret of the Wings. She was the one who made the rule of the border and feels terrible about it since it keeps her apart from Milori but it was necessary since crossing the border is dangerous.
Proper Lady: Just try and find a flaw in her propriety. Well, aside from the bit at the end of Secret of the Wings (jokingly chided by Fairy Mary).
Big Damn Heroes: At the end of Secret of the Wings, Milori comes to save the day with his squadron of owls.
Nice Job Breaking It, Hero: His pushing the snow machine into the river and the machine getting stuck making endless snow was what caused a freeze that threatened destroying the Dust Tree.
Reasonable Authority Figure: One of the heartbreaking things about Secret of the Wings is that Milori is completely right about it being dangerous for winter and warm fairies to cross the border. It is later revealed that he was the fairy whose wing was broken when he crossed the border.