Berserk Button: Despite being able to push everyone else's, Guu has plenty herself. She hates people that annoy her (From the students asking questions to Wagi's annoying laugh.) Mostly she would just eat or punch out those that annoy her. She also doesn't like being touched inappropriately even if it's a medical exam. Doctor Clive learned that the hard way. Lastly, but this is rare, anyone that tries to hurt her friends. The bear attack even triggered her ability to turn into her adult form.
Little Miss Badass: After a bear beat up Weda pretty badly and tried to attack her, she transformed into her older persona, defeated the bear and made a fur coat from his fur and everyone had plenty of meat, guess the source.
Mind Control: One time she decided to give Haré a video game controller, that had the ability to control people she choose. She also choose to change the personalities of Haré's friends and family, just fo funzies.
Trickster Mentor: Seems to be the primary character of Guu's interaction with Hare, though it's up for debate if he's actually better off from what he's learned.
Victoria's Secret Compartment: Despite being far too young to have boobs (as far as we know her age to be, probably she's fucking with our brains again), but pulls the Elder's chesthair from there. Apparently when she does, the chesthair disappears from the Elder's chest.
Abusive Parents: Her father hit her and disowned her for being pregnant with Haré, which prompted her to leave her home and not come back (until she did). She was also very cross with her mother for not having the guts to stand up to her husband (until they made up).
Cain and Abel: Because the will of her late father named her as the inheritor, her siblings tried to her have assassinated.
Genre Savvy: While she is ditzy at times, she is not completely stupid when it comes to people she knows. During an episode where she tries to piece together memories of the past, she neglects to ask Bel anything. That's because she knows any interest of the past would cause her to try to convince Weda to pack and go to the big city.
The Ditz: Very much, even though she read Dostoyevsky'sCrime and Punishment (as seen in the episode #5 of the Deluxe series, where Guu travels with Haré in time to see his mother, when she was young and frail) as a child.
Handsome Lech: He loves to chase skirts and leaves no risk-less opportunity unused to grope women, although this stops when he marries Weda after he made her pregnant again. His previous rekindling of their relationship and the subsequent marriage do seem to be motivated by genuine mutual affection and the pregnancy does only speed up the process, but doesn't start it.
Parental Neglect: His mother was busy sleeping around and took no time to be a mother to him. This memory still bothers Dr. Clive.
Running Gag: Whenever Bel chokes Clive to near death he finds himself in the after life talking to an old man. The old man turns out to be his grandfather who advises him to marry Weda, which he in the end does.
Why Did It Have To Be Dama: The only barber in the village is a kooky old lady, who claims to see spirits, which freaks Gupta out to no end, he needs someone to hold his hand, while she does the haircut.
A Japanese high school student and office lady that Guu swallowed at some point. They're oddly cheerful and extremely friendly, considering they live in the world of complete chaos that is Guu's stomach.