The American animated series OK K.O.! Let's Be Heroes features a fictional cast created by Ian Jones-Quartey.

Main K.O.

K.O. is the titular character and the main protagonist of the series. He is Carol's son and the newest employee at Gar's Bodega, which is located in Lakewood Plaza. His birthday is June 18, which is also the PIN for Carol's credit card. He is optimistic, loyal and willing to help others. Although he can be simple-minded and gullible, his friends find him reliable, and he deeply cares for them. He is also easily amazed by anything hero or weapon-related and is always looking for advice on how to be a proper hero, usually from Carol. In "Know Your Mom," K.O. believed that Carol quit being a hero when he was born, but later learns that this was not the case. The episode also shows that he did not know her name until then. K.O. has low intelligence, as for a long time he was unaware that Mr. Logic was a robot, or that Carol cooked his food, as he thought it came from the "Dinner Man". However. he occasionally showcases deductive reasoning and has been shown to be manipulative, particularly towards Darrell and Shannon. After being trapped by T.K.O in their subconscious in "Carl", K.O. accepts him as part of him in the series finale and becomes the new owner of Gar's Bodega in the epilogue.

His hero level gradually increased over the course of the series; initially starting at Level 0, he levelled up to 0.1, 1, 2, 3, 4 and then 99, attaining Level 100 in the time skip shown in the series finale. He was also Level 100 in "You're Level 100!", but this was due to a Pow Card glitch.

Enid Mettle

Voiced by: Mena Suvari (Pilot), Ashly Burch (series) Hero Level: 5 (currently)

Enid Mettle is a teenage witch who works as a cashier at the bodega, claiming herself to be a ninja and that her werewolf father and vampire mother are a supermodel and spy, respectively. Enid is the most practical and down-to-earth of the employees, but seemingly lacks motivation in her job despite being shown to handle out-of-control situations; this is shown in the events of "We've Got Pests", where she convinced a group of partiers to grow up and discover themselves. When she was a preteen, she attended "Ghoul School", and was rather shy and insecure, being embarrassed of her family and wanting to be a ninja. After the events of "Parents Day", Enid learns to accept her family's quirks as her parents warm up to her career choice, later reconnecting with her old friends from Ghoul School. She and Red Action eventually start dating, and are shown running a dojo together in the series epilogue.

Radicles X

Voiced by: Ian Jones-Quartey Hero Level: 4 (Currently)

Radicles X, more often known as Rad, is an alien teenager from Planet X, who also works as a shelf stocker at the bodega. Rad slacks off the most out of the trio despite claiming to be all-powerful and showing off. He boasts a tough masculine exterior, but is actually mild compared to other heroes and, as shown in "You Are Rad", possesses a softer side that he refuses to acknowledge out of fear of being embarrassed. In fact, Rad is more prone to crying than the others and is therefore much more sensitive to having his feelings hurt. In the series epilogue, Rad returns to Earth after having enlisting in the space army for some time and opens a cat cafe.

Mr. Gar Voiced by: David Herman Hero Level: 11

Eugene Garcia is the overseer of the plaza and owner of the bodega where K.O., Enid, and Rad work. He is tough, serious and prideful of the plaza and wishes for it not to be harmed. However, he has occasionally shown to not mind his employees slacking, as he considers it "normal". He finds it uncomfortable to be emotional around others, mainly Carol, whom he had feelings for but did not act on out of guilt. When he was younger, Mr. Gar was originally a P.O.I.N.T. member codenamed El-Bow who fell in love with his fellow recruit Carol, who was in love with their senior Laserblast. However, he was fired from P.O.I.N.T. after inadvertently distracting Carol from a stakeout which seemingly caused Laserblast's death. After some time, Mr. Gar was entrusted with the land he built the plaza on by the President of the Universe, who enlists him for several secret missions. In "T.K.O.," Mr. Gar opens up about how proud he is of K.O. while openly admitting his feelings for Carol. After a three-month time skip at the start of the second season, it is revealed that Mr. Gar and Carol have begun dating and that he has taken a father-like role to K.O.

Carol Voiced by: Kate Flannery Hero Level: 11

Carol is K.O.'s tough yet doting mother and the owner of "Fitness Emotions" at the plaza, which Ginger, Gladys and Gertie frequent. She usually gives K.O. advice, though it is not always clear what she is trying to teach. She is good friends with Mr. Gar, but is oblivious to his feelings for her. However, in "Seasons Change", she seems to acknowledge his feelings for her, but either seemingly does not care or knew about it all along. The episode also reveals that Carol had trained K.O. since he was an infant. When she was younger, Carol was originally a P.O.I.N.T. member code-named Silver Spark, who had feelings for the group's senior member Laserblast. His apparent death led her to initially bear a grudge against Mr. Gar for keeping her from preventing it, but later forgave him as he saved her life and knew of his crush for her. After a three-month time skip following the first season finale, she has started dating Mr. Gar and is revealed to still be a P.O.I.N.T. agent in secret, safeguarding the glorb tree under the plaza to prevent P.O.I.N.T. from intervening.

Recurring

Lakewood Plaza Employees Ms. Mummy, voiced by Ashly Burch Beardo, voiced by David Herman Baby Teeth, voiced by Ashly Burch

Real Magic Skeleton and Brandon Hero Level: 2 Employees at the plaza's "iFrame Outlet" frame store, which is owned by Sir eFram iFrame. Real Magic Skeleton (voiced by Ben Jones) is an idealistic living skeleton with magical powers, while Brandon (voiced by David Herman) is a laidback humanoid bear who sometimes gets on Real Magic Skeleton's nerves, yet values their friendship.

Dendy Voiced by: Melissa Fahn Hero Level: 3

Dendy is a kappa in the same grade as K.O., who uses technology to fight and is his best friend. In "I Am Dendy" she approaches K.O. on the pretext of needing help fixing her backpack so she could study him, but bonds with him over their shared interests and now considers him a friend. Though Dendy is aware of K.O.'s lack of tech expertise, this does not appear to phase her even when he accidentally released a virus on the plaza. She ultimately values her time with K.O. and considers him a close friend. In "You're in Control", Dendy tells K.O. that she loves him and that he is appreciated, even admitting that he has helped her in the "emotional sciences". In the series finale, Dendy becomes C.E.O. of the POW card company.

Mr. Logic Voiced by: James Urbaniak Hero Level: 2

Mr. Logic is a robotic hairstylist who owns the "Logic Cuts" barbershop at the plaza and is able to scan and add up everyone's hero levels. "Lad & Logic" revealed that he was originally created by Lord Boxman and helped set up Boxmore. However, Boxman's insistence to destroy the then unfinished plaza rather than robots for other villains to earn a profit convinced Mr. Logic to leave him after meeting Mr. Gar and becoming Lakewood Plaza Turbo's first worker.

Drupe Voiced by: Melissa Villaseñor Hero Level: 1

Drupe is a humanoid strawberry teenager who hangs out with Red Action and Gregg as one of the Cool Teens, usually making fun of others to hide her negative traits, as she is shy about her fashion blog. In the aftermath of "You're Everybody's Sidekick", after K.O. got her blog exposure, Drupe gradually loosened up and has become friendlier to K.O. and his friends. "RMS & Brandon's First Episode" reveals she is friends with A Real Magic Skeleton and Brandon. She later starts working as a coffee barista in the plaza after RMS indirectly convinced her she should do something with her life. She developed her own business following the events of "Project Ray Way".

P.O.I.N.T. (Powerful Operatives Investigating and Neutralizing Trouble) A superhero organization that Mr. Gar and Carol were originally members of.

Foxtail Voiced by: Melodee Spevack Hero Level: 10+ Foxtail is the leader of P.O.I.N.T., who possesses a muscular physique and orange hair along with a fox's tail. During Mr. Gar's time as a P.O.I.N.T. member, initially appearing in flashback sequences. However, after Laserblast's apparent death, Foxtail came to run P.O.I.N.T. like a military force, as she believed power is the only way to protect everyone. She makes her first physical appearance in "Point to the Plaza", expressing disdain towards Mr. Gar and looking down on his current place in life at the Plaza.

She is the head of P.O.I.N.T. Prep's Strength House, where she shows a social Darwinist outlook in her expectations that all superheroes are not created equal and only a few are worthy, wanting custody of the glorb tree under Lakewood Plaza Turbo to empower her forces. In the second season finale, she takes over the plaza for two months before accepting defeat and retiring, appointing Elodie as her successor.

Doctor Greyman Voiced by: Dana Snyder

Doctor Greyman is a grey alien who wears a fedora and purple scarf and is the team's scientist. He originally possessed telekinesis, but lost it to a power-draining weapon. Years later, despite being looked down on for being powerless, Greyman is the head of P.O.I.N.T. Prep's Wisdom House, where he is shown using a wheelchair. He is later revealed to be Chip's creator, who Foxtail fired from P.O.I.N.T. Prep after he refused to help her in her plans. He later returns in "Chip's Damage", convincing K.O. and Elodie to let Chip be retired.

Rippy Roo Voiced by: Ashly Burch

Rippy Roo is a small blue kangaroo with boxing gloves who joined P.O.I.N.T. along with Carol and Mr. Gar, supposedly being accepted into the team because of her adorable nature making her like a mascot. She speaks in an animal language that P.O.I.N.T. members somehow understand. Her pouch is a wormhole that allows her to carry an insurmountable amount of objects. Following Laserblast's funeral, Rippy left PO.I.N.T. upon realizing the path its remaining members were taking. Rippy returns in "Whatever Happened to... Rippy Roo?", which reveals she became a physic scientist and secretly attempted to retrieve Laserblast as she reconnects with Carol.

Chip Damage Voiced by: Kurt Angle Hero Level: 10, 15 (In "Mystery Science Fair 201X")

Chip Damage is a celebrity superhero that many heroes look up to, later revealed to be an android created by Doctor Greyman following the apparent death of Laserblast. Chip first appears in "Point to the Plaza", where it is shown that he cares more for his fans than helping others. Despite his efforts, Enid and K.O. end up saving the Plaza, resulting in Chip suggesting the former join P.O.I.N.T. Prep Academy. Despite this, Chip is still technically a responsive hero who gives support to young up and comers. Foxtail later uses a remote control to modify his programming to have him secretly power up their students by imbuing them with glorbs, with Elodie and Sparko being among the students of his special class, before he is deactivated. Elodie attempts to bring back Chip in "Chip's Damage", but Dr. Greyman convinces her to retire him so the next generation of heroes can take over.

Professor Sunshine Voiced by: Melanie Chartoff