Io.

Io (Ἰώ) was a character in Greek myths and legends.

She was Zeus' lover. Then he turned Io into a cow.

Argus Panoptes guarded Io.

She met with other gods and goddesses.

Argus Panoptes.

Argus (Argos) Panoptes (Ἄργος Πανόπτης) (Argus) was a many-eyed giant in Greek mythology. Also, he was known as "All-seeing Argos".

Arestor (Ἀρέστωρ) was the father of Argus.

Some of his eyes were asleep and some were open, so Argus could be a guard.

He was the guardian of Io (Ἰώ). Hera asked Argus about this.

Argus was killed by Hermes. Then Hera placed his eyes on the peacock's tail.

Epione.

Epoione (Ἠπιόνη) (Ēpiónē) was a wife of Asclepius in Greek myths and legends. She was the goddess of the soothing of pain.

Machaon, Podalirius, Panacea, Hygieia, Iaso, Aceso, and Aegle were their children.

There are different types of art that show Epione.

Doliones.

The Gegenees (Γηγενεής ) (Gēgeneēs) were giants with six arms in Greek mythology. The Doliones (Δολίονες) were the Gegenees. Cyzicus (Κύζικος) (Kúzikos) was their king.

Jason (Ἰάσων) (Iásōn) and the Argonauts (Ἀργοναῦται) (Argonaûtai) met with Cyzicus and the Doliones. It was during the quest for the Golden Fleece (Χρυσόμαλλον δέρας) (Khrysómallon déras).

There was a battle between them and Heracles (Ἡρακλῆς) (Hercules) saved the Argonauts.

Iaso.

Iaso (Ἰησώ) (Iēsō) was one of the goddesses of medicine in Greek myths and legends. Asclepius and Epione were her parents.

Panacea, Hygieia, Aceso, and Aegle were Iaso's sisters. Machaon, Telesphorus (Τελεσφόρος) (Telesphoros), and Podalirius were her brothers.

There are different stories about Iaso.

Lycurgus.

Lycurgus (Λυκοῦργος) (Lykoûrgos) was a king of Thrace in Greek mythology. His father was Dryas (Δρύας) or Ares (Ἄρης).

Dionysus (Διόνυσος) (Diónysos) was an enemy of Lycurgus.

He was killed.

Panacea.

Panacea (Πανάκεια) was a goddess of healing in Greek mythology. Asclepius (Ἀσκληπιός) (Aesculapius) was her father and Epione (Ἠπιόνη) (Ēpiónē) her mother.

Machaon (Μαχάων) (Macháōn) and Podalirius (Ποδαλείριος) were Panacea's brothers. Hygieia (Ὑγιεία) (Hygēa), Iaso (Ἰασώ), and Aceso (Ἀκεσώ) (Akesó) were her sisters.

Panacea had the ability to transform ordinary plants into medicines. She and her father Asclepius helped warriors during battles.

The word "panacea" figuratively means "a cure for all diseases".

Naiad.

The naiads (Νηϊάδες) (Ναΐδες) (Ναϊάδες) (naïádes), also known as hydriads were nymphs of springs in Greek mythology. 

Zeus was their father.

Nereids (Νηρηΐδες) (Nērēḯdes) (Νηρηΐς) (Nērēḯs) and Oceanids (Ὠκεανίδες) (Ōkeanídes) (Ὠκεανίς) (Ōkeanís) were relatives of naiads.

They met with other gods and goddesses.

There are different paintings and sculptures about these creatures.

Rhodos.

Rhodos (Ῥόδος) (Rhódos), or Rhode (Ῥόδη) (Rhódē) was a wife of Helios (Ἥλιος) (Helius) in Greek myths and legends. Goddess had her own symbol: rose.

Poseidon (Ποσειδῶν) (Posidon) and Aphrodite (Αφροδίτη) were her parents.

Helios and Rhodos had several children.

Triton (Τρίτων) (Trítōn) was her sibling.

Castor and Pollux.

Castor (Κάστωρ) and Pollux (Πολυδεύκης) were twin brothers in Greek mythology. Also, they were called Dioscuri (Διόσκοροι, Διόσκουροι).

Leda (Λήδα) was Castor's and Pollux's mother. Tyndareus (Τυνδάρεος) (Tundáreōs) was Castor's father. Zeus was Pollux's father.

Timandra (Τιμάνδρα), Clytemnestra (Κλυταιμνήστρα) (Klutaimnḗstra), Helen of Sparta, Philonoe (Φιλονόη), and Phoebe (Φοίβη) (Phoíbē) were Dioscuri siblings.

These brothers were on the expedition of the Argonauts.

Castor and Pollux saved their sister Helen (Ἑλένη) (Helénē) of Troy.

There are different stories about Dioscuri.

Terpsichore.

Terpsichore (Τερψιχόρη) was one of the Muses (Μοῦσαι) (Moûsai) (Μούσες) (Múses) in Greek myths and legends. She was a goddess of dance and chorus in Ancient Greece. Her name means "of relating to dance.

Zeus and Mnemosyne (Μνημοσύνη) were Terpsichore's parents.

Lyre was her symbol.

Terpsichore had several siblings and consorts.

Linus (Λῖνος) (Linos), Biston (Βίστων), and Parthenope (Παρθενόπη) were her children.

Atalanta.

Atalanta (Ἀταλάντη) (Atalántē) was a heroine in Greek myths and legends. Her parents were Iasus (Ἴασος) and Clymene (Κλυμένη) (Kluménē).

Golden apple, bear, and lion were Atalalnta's symbols.

She was a good hunter. Also, Atalanta had the voyage with the Argonauts (Ἀργοναῦται) (Argonaûtai).

Meleager (Μελέαγρος) (Meléagros) was her consort. They had a son named Parthenopaeus (Παρθενοπαῖος) (Parthenopaîos).

Danaïdes.

Danaïdes (Δᾰνᾰΐδες), or Danaides and Danaids were daughters of Danaus (Δαναός) (Danaós), king of Argos (Άργος). They had different mothers.

Danaïdes killed their husbands. Only one of them didn't kill her husband.

In Tartarus killers carry a jug to fill a pithos without bottom.

There are arts about these characters.

Tantalus.

Tantalus (Τάνταλος) (Tántalos) was a king of Phrygia (Φρυγία) (Phrygía) in Greek mythology. Zeus was his father and Pluto (Πλουτώ) was his mother.

Tantalus insulted the gods, so he was sent to Tartarus (Τάρταρος) (Tártaros) to Hades (ᾍδης) (Hā́idēs). There Tantalus suffered greatly.

He had wives and children. Niobe was one of Tantalus' offspring.

Gordian Knot.

Gordian Knot (Γόρδιος δεσμός) (Nodus Gordianus) was a very difficult knot in Greek myths and legends.

Phrygia (Φρυγία) (Phrygía) was a kingdom without king. Simple man named Gordias (Γορδιάς, Γόρδιος) (Gordias, Gordius) became a king of Phrygia. He called the capital after himself: Gordion (Γόρδιον) (Górdion, Gordium). Also, Gordias created the knot.

Alexander the Great cut the Gordian knot.

There is a metaphor that means solve difficult problem about the Gordian Knot.

Hesperides.

Hesperides (Ἑσπερίδες) were the nymphs of evening in Greek mythology.

There are different descriptions of these characters.

The eleventh labor of Heracles (Ἡρακλῆς) (Hercules) was one of legends. The son of Zeus went to the Garden of the Hesperides and took the golden apples.

Niobe.

Niobe (Νιόβη) (Nióbē) was a daughter of Tantalus (Τάνταλος) (Tántalos) and Dione (Διώνη) (Diṓnē).

She and her husband Amphion (Ἀμφίων) (Amphīōn) had many children.

Niobe met with other gods and goddesses.

There are many myths and legends about this character. Also, there are different arts about Niobe.

Aeneas.

Aeneas (Αἰνείας) (Aineíās) was a hero in Greek myths and legends. His parents were Anchises (Ἀγχίσης) (Ankhísēs) and Aphrodite (Ἀφροδίτη) (Aphrodítē).

Aeneas was an ancestor of Romulus and Remus.

He helped the Trojans during the war.

Aeneas was saved from Achilles (Ἀχιλλεύς) (Achilleús).

Creusa (Κρέουσα) (Kreousa) was his wife. They had an offspring Ascanius (Ἀσκάνιος).

Cornucopia.

Cornucopia (Αμαλθείας κέρας) (cornu copiae), or horn of plenty was a symbol of Plutus (Πλοῦτος) (Ploûtos), god of wealth in Greek mythology.

It was a symbol of abundance and wealth. According to legend, the cornucopia was the horn of the goat Amalthea (Ἀμάλθεια) or Achelous (Ἀχελώϊος) (Ἀχελῷος) (Akhelôios), who turned into a bull.

Many gods and goddesses were represented with a cornucopia.

Also, this symbol represented on some coats of arms.

Erinyes.

Erinyes (Ἐρινύες) (Ἐρινύς) were goddesses of revenge in Greek myths and legends. Uranus (Οὐρανός) and Gaia (Γαῖα) (Gaîa) or Nyx (Νύξ) (Nýx) were their parents.

There were three Erinyes: Alecto (Ἀληκτώ) (Alēktṓ), Megaera (Μέγαιρα) (Mégaira), and Tisiphone (Τισιφόνη) (Tisiphónē).

These goddesses persecuted Orestes (Ὀρέστης) (Orestēs) after he killed his mother Clytemnestra (Κλυταιμνήστρα) (Klytaimnḗstrā).