Former student of Philoctetes who was well known as one of the greatest heroes ever due to his nearly invulnerable body, but after an incident where he was defeated by an attack to his right heel (which is the only part of his body that isn't invulnerable) he became the laughing-stock of Greece and an old washout, being forced to keep his vulnerable heel in a protective shoe. He temporarily gained his powers back, as well as removing his famous weakness in a deal with Hades but lost it again soon after. Voiced by Dom Irrera.
The drill sergeant for Spar O.T.C., a strict training camp in Sparta where soldiers and royalty come to train. A fierce and unforgiving man, he prepares the future soldiers of Sparta for the terrors of war, although his rank is constantly undermined by Ares, his commander-in-chief. Voiced by Patrick Warburton.
Bob is the narrator of the Hercules film and animated series. Unlike the Muses, he tries to tell Hercules' story in a more serious and orderly manner but he is usually always interrupted and replaced by the Muses. In Hercules and the Return of Typhon it is revealed that he is actually a disembodied voice, and is married and has two kids named Tiffany and Chad who are also invisible. Voiced by the late Robert Stack.
Vick and Evelyn
Cassandra's parents. Unlike their daughter they seem very cheery and friendly, but they apparently don't take their daughter very seriously, especially when she mentioned that she had sold her soul to Hades. But unlike Vick who thinks that a monster invites him to eat rather than being eaten, Evelyn sees this and gets in her husband's face when she's serious.
The undead ferryman of the Underworld who carries mortals and Hades across the River Styx. He is a very cautious person who tries to avoid trouble, claiming "I just row the boat!" He is easily bribed by those who wish to enter the Underworld, to the point he was allowed Hercules and Phil to enter after the latter offered him a Newspaper of current events.
A centaur known as a legendary hero, trainer of heroes, and author who is an old friend and rival of Philoctetes.
This friendly blond beauty is the most popular girl at Prometheus Academy and Adonis' girlfriend. Despite her elevated status, she is close friends with Hercules, seeing the good in the demigod despite his clumsy ways. Voiced by Jodi Benson.
Homer is a reporter for the Greekly World News who appears throughout the show, occasionally writing reports about major events that Hercules is involved in. He is prone to embellishing the events that he reports. Voiced by Dan Castellaneta.
A group of urns and jars that Icarus brought to life with some unintentional help from Aphrodite. Icarus refers to them as his and Cassandra's babies, something that horrifies and disgusts her.
A heroic man of the sea who was trained by Philoctetes. Along with his Argonauts he has been searching for the legendary Golden Fleece which is said to hold great power. A man with infinite enthusiasm for adventure, he always presses forward when the situation looks absolutely hopeless. The Argonauts have long since lost respect for Jason, constantly talking behind his back and even plotting behind his back. He is well-aware of this dissension, though does his best to ignore it. Voiced by William Shatner.
A transfer student from Trojan Academy and Icarus' friend and rival for Cassandra's affections. He is a Mykloid fan-boy of the comic-scroll superhero Myklos. He looks like Icarus but more healthy looking with well cut hair and normal looking eyes. Ironically, Cassandra is actively fond of Melampus and accepts his advances, which infuriates Icarus.
An elderly griffin who lives at the Elysian Sunset Rest Home in Room XXIII (23). He is the protector of the very first diamond crafted by the blacksmith Hephaestus. For ages, a thieving band of mountain gnomes under the leadership of King Arismap always plotted to swipe it. Voiced by Tim Conway.
Oracles of Delphi
Three powerful oracles who know all that has and will happen. They are also the founders of the Oracle Friends Network, which Cassandra became a part of after she graduated.
She is a mule belonging to Amphytryon and Alcmene who usually pulls the hay wagon. In the film, she sprained her ankle and Hercules had to replace her by helping deliver the hay wagon to the market. She appears again near the end of the film welcoming back Hercules after he chooses a mortal life on earth.
She is a white female cat, owned by a citizen of Thebes. She is seen just before that Hercules fighy the Hydra.
Prometheus Academy staff
- Ms. Cassiopeia, Poetry Teacher (voiced by Alice Ghostley)
- Phys Oedipus, teacher of Physical Education (voiced by Richard Simmons). He presents constant enthusiasm for physical education, but cowers in fear of the actual activity.
- Miss Thespius, Drama Teacher (voiced by Kathy Najimy)
- Mr. Daedalus, (a.k.a. Dad-alus) ProAc Shop Class Instructor, father of Icarus, and greatest inventor of all antiquity. (voiced by David Hyde Pierce)
- Mr. Herodotus, History teacher (voiced by Jess Harnell & Paul Reubens). Constantly surely and agitated towards his students, he often ignorantly mocks youth terminology to prove a point.
- Mr. Pygmalion, Art teacher (voiced by Calvert DeForest)
- Mr. Ptolemy, Astronomy Instructor (voiced by George Takei)
- Mr. Aesop, Storytime Instructor for ProAc, Jr (Prometheus Junior Academy) (voiced by Bob Keeshan)
- Miss Euphrosyne, Home Greconomics Teacher (voiced by Melissa Manchester). Often endlessly cheery, which drives Cassandra insane.
- Mr. Linus, Music Teacher (voiced by Jason Marsden)
A servant of King Midas who posed as an agent from Athens Intelligence in order to trick Hercules.
A selfish and pompous hero who likes to go heroing on the weekends. After Pegasus and Hercules have a fight Bellerophon and Pegasus team up to fight the Chimera thus earning him fame and adoration, but when Pegasus wants to return to Hercules, Bellerophon uses a magic necklace to control Pegasus and make him his slave. Voiced by David Schramm.
Briares, The Hundred Handed One
A powerful giant said to have a hundred hands. Despite being called the Hundred Handed One, he only has two visible arms. The reason he is called this is because he can sprout over a hundred hands from any terrain. Depending on the terrain that the hand is summoned it will take on the element of the terrain such as if it is summoned in a body of water, a rocky terrain or on a plant it will take on the attributes and physical appearance of the terrain. He is also an open comic book fan, and a big follower of Miklos. Voiced by Reggie Miller.
A gorgeous enchantress who has the power to make men fall in love with her or turn them into animals if she's annoyed. She arrives and decides to make Icarus her new boyfriend, but after spending five minutes with him turns him into a platypus. By the end, thanks to Helen and Cassandra taking her staff and undoing her enchantments, she turns her way around and becomes good. Voiced by Idina Menzel.
The Gods of Ancient Egypt who came to Rome when they were seeking Gods. However they were not pleased with Rome's appearance and they decided to destroy the city so they could build pyramids in its place.
A goth girl from Prometheus Academy with depression and anger issues who can summon a type of Furies when fully enraged. Hercules temporarily changed his look in order to go out with her. He was successful until he showed her his real personality while fighting her furies, after which she abandoned him. Voiced by Joey Lauren Adams.
Creatures created by Electra's anger. Unlike the more reptilian Furies of the Underworld, these Furies resemble large birds with mechanical wings and spiked collars.
The leader of a band of thieving mountain gnomes known as the Arismapse, he has always had the intentions of getting his hands on the first diamond crafted by Hephaestus. For a long time, Mr. Griff, the griffin tasked with guarding the diamond, has constantly foiled him and his bandits. Voiced by the late Harvey Korman.
King MidasThe antagonist of Hercules and the Golden Touch, a greedy king whose touch can turn anything to gold. He realizes the error of his ways after he turns his daughter Marigold into gold. Voiced by Eugene Levy. He was originally going to be the plot of "Hercules and the Prince of Thrace" before the plot was tossed out, although the Muses were not aware of this until the show had already begun, spending the rest of the episode referencing him.
The Medusa, Griffin and Minotaur
They were sent by Hades to gang up on Hercules, however all three were defeated in less than a second.
Kill the Stymphalian Bird
- Main article: Kill the Stymphalian Bird
Kill was a giant bird with human face sent by Hades to kill Hercules and was one of the infamous Stymphalian Birds.
Adonis' Trojan Academy counterpart and arrogant Trojan prince.
The selfish and cruel king of Thessaly who posed as Zeus during a festival in order to fool his subjects into worshiping him no matter how more cruel his actions became, luckily he was punished by Zeus for his blasphemy and banished to the Grove of Despair. He attempted to return to the throne numerous times, failing every time with Hercules ultimately convincing Thessaly they did not need a King. Voiced by Jeffrey Tambor.
A small and annoying Harpy who steals whatever she can find. She resembles the ones from the film and series, only she is much smaller and green with a lime scarf. She appeared in the episode Hercules and the Epic Adventure wherein Hercules lost his poem for creative writing class and had to get it back or else fail, but along his journey to reclaim it many obstacles get in his path, with most notably being this Harpy who kept claiming the poem was hers and that she wrote it. At the end, she stole Hercules' grade. She also made an appearance in Hercules and the Bacchanal.
A cyclops who sold his soul to Hades and is in service to him. Despite his relentless behavior by day he is a good and kind friend to Medusa.