1. The king of Pylos, he is too old to participate in the fighting of the Trojan War, but serves as an advisor. He tells tales of 'the good old days' to the other heroes.

2. Yet another son of Priam and Hecuba, this priest of Apollo shares Cassandra's doubt about the merits of bringing the Trojan horse into the city. 'Timeo danaos et dona ferentes,' he says (according to Vergil), 'I fear the Greeks, even bearing gifts.' Later, while sacrificing a bull, two serpents from the sea crush both him and his two young sons. The death of Laocoon is often blamed on Athena (into whose temple the serpent disappeared) but more likely the act of Poseidon, a fierce Greek partisan.

3. Identified in the Theogony as 'Phix,' it was a hybrid monster whose parentage varies widely from source to source. She was a lion-bodied, winged monster with the face of a human, who terrorized the city of Thebes in the generations before Oedipus. She would give a riddle — 'What creature has one voice and yet becomes four-footed and two-footed and three-footed?' — and eat anyone who was unable to answer correctly. It is possible that the Sphinx was sent to Thebes from Ethiopia by either the goddess Hera or the war god Ares. Eventually, Oedipus correctly answered the riddle— 'Man' — and the Sphinx threw herself off her mountainside perch to her death.

4. This son of Laertes is known for his cleverness and glib tongue. His accomplishments include a successful night raid against King Rhesus, winning the armor of Achilles, and engineering the famous Trojan Horse. His ten-year trip home to Ithaca (where his wife, Penelope, awaits) is the subject of the Odyssey.

5. A monstrous beast sent by Artemis to wreak havoc in Calydon after King Oeneus neglected to honor her while sacrificing to the gods. Oeneus's son Meleager led a group of heroes — including Theseus, the twins Castor and Polydeuces (or Pollux), and Achilles's father Peleus, as well as the huntress Atalanta — on what became known as the Calydonian Boar Hunt. Atalanta drew first blood, and Meleager finished off the beast. Meleager, who had fallen in love with Atalanta, then insisted on honoring her by giving her the hide. Meleager's uncles protested, Meleager killed them, and Meleager's mother avenged the death of her brothers by burning up the log that represented Meleager's lifespan, killing him.

6. The daughter of Njord and twin sister of Frey, she is also a Vanir hostage living with the Aesir. The goddess of love, passion, and human fertility, her possessions include a cloak that allows her to turn into a falcon, and the necklace Brisingamen. She travels in a chariot drawn by two cats.

7. Beautiful women who appeared harmless and sang a beautiful song to passing sailors, only to prove vicious and bloodthirsty when the sailors ventured too close. The Greeks often said that the Sirens were the daughters of the river god Achelous, while the Romans named their father as Phorcys. In the Argonautica, Chiron warns Jason that Orpheus will be instrumental on his journey, and Orpheus later saves all of Jason's crew (save Butes) by playing his lyre when they pass the Sirens to drown out their beautiful and alluring song. Odysseus also encountered the Sirens, tying himself to the mast of his ship so that he could safely hear their song while his crew plugged their ears with beeswax, on the advice of the sorceress Circe.

8. The three-headed (or, according to Hesiod's Theogony, fifty-headed) dog who guarded the gates to the Underworld. A child of Typhon and Echidna, Cerberus is described as a hellhound with a mane of snakes, the claws of a lion, and the tail of a deadly snake. As Heracles' twelfth and final labor, he had to bring Cerberus back from the Underworld, which he did following an intense wrestling match. Prior to the task, Heracles was instructed in the Eleusinian Mysteries, and freed Theseus from being stuck on a chair in Hades. In Virgil's Aeneid, the Cumaean Sibyl gives Cerberus three drugged honey cakes so that she and Aeneas can enter the Underworld.

9. Osiris took Isis, his sister, for his wife, and ruled over the earth. Set grew jealous of his brother and killed him, afterwards cutting his body into fourteen pieces and hiding them in various places around Egypt. He then claimed kingship over the land. Isis searched the breadth of the land until she had recovered all of the pieces and, with the help of Anubis, embalmed the body. She conceived a son, Horus, by the (still dead) Osiris, then resurrected him. Horus defeated Set to regain the kingship, and all subsequent pharaohs were said to be aspects of him.

10. The god of the sky and light and the son of Isis and Osiris. In earlier myth he was the brother of Set, and son of Ra. His mother impregnated herself by the dead Osiris, then hid Horus. When he was grown, he avenged his father's death, driving away Set. In the battle, he lost his eye, but regained it thanks to the god Thoth. Thus Horus came to rule over the earth. He was known to have two faces, that of the falcon, Harsiesis, and that of a child, Harpocrates.

11. A Knight of the Round Table who accompanies Sir Galahad and Sir Bors on the successful quest for the Holy Grail. Percival is one of the sons of King Pellinore. He was raised in the woods by his (unnamed) mother until he turned 15. Although Percival fails to identify the Holy Grail during an early encounter with the wounded Fisher King that involved a bleeding lance, he later heals the Fisher King's wound at the end of the quest. In some stories, Percival loves a woman named Blanchefleur, and he is named as the father of Lohengrin in many Germanic sources.

12. The first human woman in Greek mythology. Hephaestus sculpted her from clay as a punishment for humanity after Prometheus stole fire from the gods. The primary myth of Pandora relates how she released all the evils of the world by opening a jar ('Pandora's Box'), and when she closed the lid only hope remained within. Pandora married the Titan Epimetheus, and their daughter Pyrrha survived the Greek flood with her husband Deucalion.

13. The daughter of Leodegrance and the wife of King Arthur. In one story, Guinevere is abducted by Meleagant (or Melwas), a king of Somerset, and rescued by Lancelot, beginning an illicit affair between the two. After the affair is revealed to Arthur (in some sources by Mordred, in others by Agravain), Arthur orders her to be burned at the stake; she is rescued from that fate by Lancelot in a battle that results in the deaths of Sir Gareth and Sir Gaheris and the permanent exile of Lancelot. Some sources say that Guinevere spent her final days hiding in the Tower of London or in a nearby convent.

14. Termed the 'lady of the castle,' for her role as guardian of tombs, she sided against her own husband, Set, in his battle against Osiris, but when Set was destroyed, she collected the bits of his body and brought him back to life, much as Isis had done for Osiris. In addition to being Isis' sister, she was also said to be Osiris' mistress, leading to much complaint from Isis. Due to her close ties to all the other gods, she was rarely associated with a cult of her own.

15. A character who goes by many other names, among them Nimue and Vivien. In many stories, the Lady of the Lake is responsible for bestowing Excalibur upon King Arthur. She also gave Merlin his powers of sorcery and raised Sir Lancelot after his father's death. The Lady of the Lake is frequently associated with the isle of Avalon and is sometimes conflated with Morgan le Fay.

16. Considered the most beautiful mortal woman during the Age of Heroes. Helen was the daughter of Zeus and Leda, and her siblings were Castor, Polydeuces (or Pollux), and Clytemnestra. When Helen married Menelaus, the king of Sparta, Helen's father Tyndareus forced the Greek kings to swear an oath to fight for her if she were kidnapped. When she was abducted by (or eloped with) Paris, a prince of Troy, the whole Greek world plunged into the Trojan War. For this reason, Christopher Marlowe had Doctor Faustus refer to Helen as 'the face that launched a thousand ships.'

17. This prince of Salamis is the son of Telamon. He once fights all afternoon in single combat with Hector; since neither one can decisively wound the other, they part as friends. Ajax's most glorious achievement is fighting the Trojans back from the ships almost single handedly. He commits suicide after the armor of Achilles is awarded to Odysseus rather than to himself.

18. The Egyptians believed that the soul had three components, the ba, ka, and akh, each of which had different roles after death. The ka remained near or within the body (which is why mummification was required). The ba went to the underworld where it merged with aspects of Osiris, but was allowed to periodically return (which is why Egyptian tombs often contained narrow doors). The akh could temporarily assume different physical forms and wander the world as a ghost of sorts. In the underworld, the ba was subjected to the Judgment of Osiris in the Hall of Double Justice, where the heart of the deceased was weighed against Ma'at, commonly represented as an ostrich feather.

19. The wife of King Agamemnon and the sister of Castor, Polydeuces, and Helen. When Agamemnon's troops were stuck at Aulis en route to Troy, he sacrificed their daughter Iphigenia, which made Clytemnestra very angry. She later began an affair with Aegisthus, Agamemnon's cousin; when Agamemnon returned to Mycenae after the Trojan War, Clytemnestra and Aegisthus murdered him and his concubine Cassandra. In response, Clytemnestra and Agamemnon's son Orestes killed both Clytemnestra and Aegisthus, continuing the curse of the House of Atreus.

20. A son of Odin and the giantess Jord, he is the god of thunder, weather, and crops. One of the most popular of the Norse gods, he travels in a chariot pulled by two goats, and wields the hammer Mjölnir. He is married to Sif, and his special nemesis is the Midgard Serpent.

21. Son of Osiris and Nepthys, and god of embalming to the Egyptians, he was typically pictured with the head of a jackal. He also served as the god of the desert and the watcher of the tombs. He also served to introduce the dead to the afterlife, and as their judge. To decide the fate of the dead, Anubis would weigh the heart of the dead against the feather of truth. Anubis is sometimes identified with Hermes or Mercury.

22. The daughter of Ra, she predated the universe and served over the creation of it, ensuring balance between everything. Primarily seen as the keeper of order, Ma'at was responsible for seasons, day and night, rainfall, and star movements. A symbolic offering of Ma'at, in the form of a statuette was given to the gods, as Ma'at encompassed all other offerings. Ma'at's aspect as god of justice also showed through her role in death ritual, where her ostrich feather was weighed against the hearts of the dead in the underworld. Judges wore effigies of Ma'at, and the supreme head of courts was said to be the priest of Ma'at.

23. The son of nine sisters, he is the god of light and guardians. He guards Bifrost, the rainbow bridge into Asgard. His senses are so sharp, he can see one hundred miles by night or day and hear grass growing. He will call the Aesir into battle at Ragnarok with his horn Gjall (or Gjallerhorn).

24. Also known as Wodin or Wotan. The 'All-Father,' he is the leader of the Aesir, the principal group of Norse gods. He is a god of war, death, wisdom, poetry, and knowledge, and rides the eight-legged horse Sleipnir. He hung himself for nine days on the world-tree Yggsdrasil, pierced by his own spear, to gain knowledge, and traded one of his eyes for a drink from Mimir's well to gain wisdom.

25. The most famous Cyclops in Greek mythology, the son of Poseidon and the sea nymph Thoosa. The most notable myth involving Polyphemus is his appearance in Book IX of Homer's Odyssey: after Odysseus and his crew land on Polyphemus' island after escaping the Lotus-Eaters, Polyphemus eats two of Odysseus' crew, imprisons the rest in his cave, and eats four more before the survivors can escape. To escape, Odysseus gets Polyphemus drunk on wine and blinds the one-eyed giant with a stick; the next morning, Odysseus and his crew ride out of Polyphemus' cave, hiding underneath the Cyclops' sheep. When Polyphemus asks Odysseus' name, Odysseus responds 'No one' or 'No man' (translations vary), and Polyphemus prays to his father Poseidon to make Odysseus' journey home treacherous. In another myth, Polyphemus falls in love with the nymph Galatea, who in turn loves the human Acis. Polyphemus then kills Acis with a boulder out of jealousy.