Principal Rabbaski
Principal Rabbaski is the head of McQuarrie Middle School. Her main focus is on Dwight because she feels he and his Origami Yoda is disruptive to the school. Every time she sees Origami Yoda in action, Dwight gets into even more trouble. What will be the final straw for Rabbaski?
Quavondo (The Cheeto Hog)
Quavondo needs the help of Origami Yoda when he becomes the only one in Middle School allowed to buy something from the vending machine in the hallway. Because he did not share the Cheetos with anybody, he was labelled The Cheeto Hog. Hopefully, Origami Yoda can help him restore his reputation. No one wants to be known as a Cheeto Hog, especially Quavondo.
Marcie
Marcie is an eighth-grader who hates Origami Yoda as much as Harvey does. She despises it because she was going to a spelling bee and Origami Yoda told her that the winning word would be mulked, but then realized it was spelled mulct. She totally fell for it, because none of the contestants ever had to spell mulct, and she lost to the word vestige. Tommy says that in the dictionary, mulct means to be punished or tricked. Those two things are what Dwight (or Origami Yoda?) did exactly! Will she help Harvey destroy Origami Yoda?
Caroline
Caroline is a seventh-grader at McQuarrie Middle School and seeks Yoda's help when bully Zack Martin snaps three of her pencils at once to show off. Zack Martin is a seventh-grader whom Dwight and his friends think failed seventh-grade a few times and is around fifteen years old now. Dwight likes Caroline and vice versa, so Dwight wants to do everything he can to take revenge on Zack. Will Yoda's advice solve Caroline's "Zack" problem? If so, maybe it will also stop Zack from beating up other kids at school.
Sara
Sara is a sixth grade student who is rumoured to like Tommy, but Tommy likes Sara and he does not know if he should ask her out to dance at the upcoming Fun Night. Tommy tries to ask Origami Yoda if she likes him but Origami Yoda will offer a straight answer. Ugh! What can Tommy do? Will Sara ask him out first or reject him? Read the book to find out!
Mr. Howell
Mr. Howell is the homeroom teacher for the grade six students at the school. He is very strict and cannot tolerate people coming in late for class. If he catches anyone disobeying the rules, he sends them right to the Principal's office. The students fear ISS (in-school suspension), but seek Origami Yoda's advice to avoid the wrath of Mr. Howell. Dwight and his friends have to find a way to avoid the troublemakers and ISS until next month so that Tommy can actually participate in the next Fun Night.
Kellen
Kellen is one of Tommy's friends in the sixth grade and he helps Tommy on the case file. He makes some chapters in the file and draws the doodles in the rest of them. He likes this girl named Rhondella, but he does not know if she likes him. So he has to make Rhondella ask Origami Yoda because it will tell her that Kellen likes her. However, she thinks that Kellen is annoying. Rhondella might think that she likes Kellen afterward.