Chronic Hero Syndrome: Her compassion commands that she must attend to a harmed creature, regardless of the situation. This is what lead to Dragonfly entrusting her with Tin Can Turtle's soul, as well as Blitz's loyalty and Raven's (albeit initially begrudging) respect.
Credenza: I wasn't trying to be a hero. I just saw they needed help. How could I turn away from that? I can't just look the other way and pretend there isn't evil at work here.
Lampshade Hanging: See her above quote, which she says to herself occasionally when she's aware that she's about to get herself into a world of trouble by doing good for someone else at no reward, but goes ahead regardless.
You accepted the slavery of the Raven because you were scared of death. I accepted because I was afraid to go on living. In exchange for my faithful service, the Raven agreed to take away my fear and sadness. I no longer wanted my life, I had no reason to refuse.
Spot the Impostor: Tries this against Tuff and Riley; it falls apart when he can't carry Riley's BFS (and because the real Riley's pants were unbuttoned, which Han failed to notice).
Shapeshifter Guilt Trip: When backed into a corner by Lucinda; he makes himself look like Knull, Miss Tabitha, and Corveau in a desperate attempt at this trope. He ultimately shows Lucinda (but not the reader) his true form before dying.
You didn't think the Raven would leave a job like this to your little band, did you?
Big Bad Wannabe: Would have preferred himself as the Raven's herald, as opposed to Affably Evil Captain Snow. Snow, on the other hand, sees right through him:
...a beggar boy with a loud mouth and no friends who was promised the world in exchange for his soul.
Zatachi, Tatami, Gozazi, Tusura, Vamuro. Trained as protectors and companions to Prince Paollo, and currently traveling with the heroes.
The Bus Came Back: Dissapeared from the story after Paollo was taken. Reappeared in Book 7.
Dead Man Switch: All of which are linked to each other and Paollo. If anything should happen to any of them (or the prince), the King would know and the entire Eastern Army would come down on the head of those responsible.
Psychic Link: The book's Reader is the only one it allows to understand its pages. Even after Lucinda's Face-Heel Turn (and the selection of a replacement Reader), she and the book were still able to sense each other's presence. Much later, the Listing immediately knows when Lucinda is dead.
Credenza: It's a long and complicated story, your highness. Mikel: Well I just happen to ADORE long and complicated stories. Please, just call me Mikel.