Charybdis

Charybdis was a monstrous creature in the Greek mythology, said to haunt a narrow channel with Skylla on the other side of it.

Influence
When the Adrestia and her crew were approaching the Pirate Islands, specifically Keos, Herodotos joked about Barnabas' suggestion for carefulness with a comment about Charybdis and Skylla waiting at the bottom of the sea. Barnabas corrected that the reason for care were the pirates patrolling the seas around the islands.

Trivia

 * To be is an idiom akin to "between a rock and a hard place."
 * A cosmetic pack for the ship Adrestia can be bought from the Helix Store called Charybdis & Skylla Naval Pack, featuring Skylla as the figurehead as well as on the sail in Assassin's Creed: Odyssey.
 * Skylla and Charybdis feature in Homer's Odyssey.

Appearance

 * Assassin's Creed: Odyssey