A sea goddess came to help Odysseus.
Hermes
Poseidon got mad that the gods let Odysseus leave Calypso's island. So in order to make Odysseus's travel worse, Poseidon creates a storm sending Odysseus under water along with his raft.
Odysseus mother
Odysseus hides under Polyphemus' largest ram as it exits the cave.
Odysseus and the crew rescue themselves from the cyclops. Odysseus later escapes under Polyphemus' largest ram.
Odysseus hides under the largest ram as it leaves for the pasture in the morning.
Antinous throws a stool at Odysseus. "And with that he grasped the stool and threw it, striking Odysseus on his back, under the right shoulder."
He can't kill the cyclops because only Polyphemus can move the rock to open the cave. So Odysseus decides to get him drunk then blind the cyclops. Odysseus then wraps himself under the sheep so he can reach outside without alerting the cyclops.
Under the sheep.
The Charybdis is a giant whirlpool that lives under an enormous fig tree. It tried to suck in Odysseus's ship.
Ajax
Ajax
Odysseus falls asleep under an olive tree when he finally reaches the Phaiakian shore. He is exhausted from the journey and is discovered by Nausikaa, the princess of the Phaiakians, who helps him and eventually leads him to safety.