Though she was not exactly a 'beast', Perseus was known for slaying a monster, the gorgon Medusa.
Polydectes.
To slay Medusa.
he was known for slaying Medusa A horrible gorgon ,a mythical beast which hideous features which turn victims to stone, he was sent by polydectes to slay her as a wedding gift to get rid of perseus in order to marry his mother. Soon after perseus turned a horrible sea beast to stone to save a princess which later became his wife of 6 kids (5 boys and 1 girl).He returned with the head and turned polydectes to stone as the king did not believe him so perseus showed him the head therefor ending the myth
Thesius.
It is the quest of King Pellinore's family to slay the Questing Beast.
Perseus was sent to slay Medusa and bring back her head.
Perseus faces external conflict with the gods, particularly with the character of King Polydectes. Polydectes sends Perseus on a perilous quest to slay Medusa in order to get rid of him within the story of Greek mythology.
The god Hermes aided Perseus by providing him with a sword to slay Medusa and a reflective shield to avoid looking directly at her. Additionally, Athena helped Perseus by giving him a polished shield to help him safely approach Medusa.
Perseus receives gifts from the gods in the book "Perseus". Hermes gives him a sword, Athena provides a polished shield, Hades lends him his helmet of invisibility, and Zeus gifts him with winged sandals. These gifts help Perseus on his quest to slay Medusa and save Andromeda.
He uses the mirrored back of the Aegis to strike at Medusa without looking her in the eyes. He beheaded her, and then put the head in a sack.
Perseus needs the Grey Woman, also known as the Graeae, to provide him with information about the location of the Gorgon Medusa. The Grey Woman possess knowledge of where to find the nymphs who guard the items Perseus requires: a reflective shield, winged sandals, and a cap of invisibility. By obtaining this information, Perseus can successfully prepare for his quest to slay Medusa.
Perseus was trained by the centaur Chiron, who was known for his wisdom and skills in various arts, including medicine and combat. Chiron provided Perseus with essential knowledge and skills to help him on his quest to slay Medusa. Additionally, he was assisted by the gods, particularly Athena and Hermes, who provided him with divine gifts and guidance.