The Character Sheet for Ollie's Pack. It is currently under construction.
Oliver "Ollie" Allen
- Voiced by: James Hartnett
- Brilliant, but Lazy: Although creative and quick-thinking, he tends to put his wits mostly into using the Monster Pack for cheap purposes and is generally reckless.
- The Chosen One: He is literally referred by this title, being the latest in a long line of people tasked by Captain Wowski with taking care of the Monster Pack.
- Gratuitous French: He occasionally peppers his speech with French phrases.
- Idiot Hero: Downplayed. While Ollie has fairly average booksmarts and can be quite creative, his impulsive personality, tendency to let his pride best him, and inexperience with using the Monster Pack means that he's prone to causing big mess-ups and not thinking things through.
- Jerk with a Heart of Gold: For all his faults, Ollie is a well-intentioned kid who does his best to learn from his mistakes and generally tries to use the Monster Pack for good purposes.
- Kid Hero: An ordinary middle school student who spends his time dealing with the monsters from another dimension and protecting a magic backpack.
- Red-Headed Hero: He has red hair and is The Chosen One tasked with protecting the Monster Pack.
- Small Name, Big Ego: His status as The Chosen One can get to his head, giving him a bit of an inflated opinion of himself despite the fact he still has a lot to learn about protecting and using the Monster Pack.
- Why Did It Have to Be Snakes?: He is afraid of geese due to being attacked by some when he was three.
Cleopatra "Cleo" Badette
- Voiced by: Ana Sani
- Ambiguously Brown: She has darker skin than either Ollie or Bernie, but her ethnicity is never stated.
- Deadpan Snarker: Frequently drops snarky remarks when it comes to Ollie misusing or abusing power of the Monster Pack.
- Massive Numbered Siblings: She has about six brothers.
- One of the Boys: Very much the tomboy, given that both of her best friends are guys and she's the only girl among her family's many brothers.
- Plucky Comic Relief: She's the self-described comic relief for Ollie and Bernie.
- Pungeon Master: She drops puns frequently and with great pride (usually cuing a groan from her friends).
- Wrench Wench: She fancies herself as having a knack for mechanics, such as designing a robot suit or trying to fix her grandmother's car. However, most of her efforts at such backfire.
- You Gotta Have Blue Hair: She has blue hair.
Bernardo "Bernie" Alves
- Voiced by: David Berni
- The Bore: Due to the fact his favorite hobbies tend to be things that Ollie and Cleo find monotonous and bland, he is sometimes seen as this by his friends.
- Deadpan Snarker: He sometimes rivals Cleo when it comes to snarkiness towards Ollie's actions.
- Dude, Where's My Respect?: Several episodes highlight how he sometimes feels as if Ollie and Cleo don't appreciate him due to how different his attitude is compared to them.
- Mixed Ancestry: His father is a Brazilian Latino and his mother is Caucasian.
- Nerd: While he doesn't look the part, his interests and attitude are often of the nerdy variety.
- Shorter Means Smarter: He's the smallest and most intelligent of the main trio.
- The Straight Man: He's the self-described voice of reason to Ollie and Cleo.
- Voiced by: Cory Doran
- Affectionate Nickname: Ollie calls him C.W. for short.
- Aliens Among Us: He's a cat-like being from another dimension who lives in Ollie's closet, with Ollie's family believing him to be an ordinary housecat. He also occasionally puts on disguises to intermingle with people. Some people notice that he can be acting a bit suspicious, but nobody ever calls him out for being an impostor.
- Brilliant, but Lazy: Although his style of mentorship is very lackadaisical, he is actually pretty competent when he puts his mind to something and actually does dispense good advice quite often.
- Mentor Archetype: His duty is to train Ollie as The Chosen One and protector of the Monster Pack.
- Nice Guy: He has a pretty chill attitude, making him surprisingly mellow and easy to get along with most of the time.
- Non-Human Sidekick: He's a cat-like creature from another dimension who helps Ollie protect the Monster Pack.
- Voiced by: Ned Petrie
- Stern Teacher: He has little tolerance for any disruption at his school, especially if it's from Ollie and his friends, but he is nonetheless fair and well-meaning.
- Voiced by: Naomi Snieckus
- Parental Obliviousness: She has absolutely no idea that Ollie is The Chosen One or that the family cat is actually an intelligent monster from another dimension.
- Voiced by: Leigh Cameron
- Annoying Younger Sibling: Sometimes this to Ollie.
Andre and Bev
- Voiced by: Mark Little (Andre) and Kayla Lorette (Bev)
- Bounty Hunter: Both of them. They seek to use the Monster Pack to hunt down all the monsters they can with it.
- Evil Duo: They're the most frequently recurring antagonists for Ollie and his friends, with Andre as the more comical of the two and Bev as the more serious one.
- Huge Guy, Tiny Girl: Andre is the huge guy to Bev's tiny girl.