Bertha: "Huh! How about that! You gotta go to the FUCKING bathroom, right? Well, you have to fucking get past ME, FIRST! Oh, and I already defeated a few students in battle. Let's fucking do this shit!"
(Defeated after her first rival battle)
Bertha: "Fucking. Wow. You must be so FUCKING proud of your fucking self!"
Verbal Tic: Bertha has a habit of inserting the f-word into her sentences, to the point that it seems to be more of a tic, rather than a habit.
Colin Shutland
Class Clown: He has a hard time answering basic questions about what hazard signs are indicating. This could be seen as an act, since Colin is apparently very intelligent.
Erik Masspunch
Big Bad: Well, he's big, bad, and LOVES to make certain everyone knows it. The fact that he is 500 pounds of pure muscle makes the mere thought of challenging him to battle can send one into a serious heart attack.
The Bully: Let's just say, if he was to start a company in bullying, he'd end up as a CEO around the world.
Epic Fail: He tries to disprove certain myths about a school, only to end up proving it right, by getting defeated by a weak-looking 10-year-old boy. By contrast, Erik is 500 pounds of pure muscle.
The Hacker
Beware the Nice Ones: He showed he was willing to do anything to defend himself against his enemy at the age of 10.
I Am Your Father. Inverted. Moe knows who his father is, but has no idea that his father is also the World's Fighting Champion, Vegeta.
Oh, Crap!: Seriously, you do not want to be around him whenever he gets a bad feeling about something, nor do you want to hear him say he has a bad feeling about something, as something will happen.
Shipper on Deck To Amy Jr. and Moe. Also has quite some mileage on Hannah the Usul and Armin the Bori, calling them "lovebirds" frequently.
Moe
Beware the Nice Ones: History repeats itself for Moe, where he has to protect the entire Student Body from a bully.
Bully Hunter: Moe shows clear intentions to stop Erik Masspunch from hurting any more students.
Nice Guy: Moe has a strong aversion to anything dramatic or negative. Plus, he's the only one to give Amy Jr. a Valentine's Day card every year, whereas no other student has done this.
The Dark Side
Dark Is Not Evil: The Dark Side itself reveals that it helped Moe defeat Erik by guiding his every motion, and dramatically increase his power.
I'm Your Worst Nightmare: The Dark Side obviously knows what EVERYONE fears most, since it is a literal part of every character's personality.