Throughout the series, demigods often have dreams of importance, indicating a message from someone else, or what may happen in the future.
Percy has a dream of Grover in a wedding dress in a bridal shop, trying to run away, as he is coming. These dreams are revealed to be the result of an empathy link Grover created between them to communicate with Percy for help.
Percy dreams Daedalus and his son Icarus trapped in his workshop by King Minos. Icarus created wings to help himself escape, but did not listen to Daedalus' warning to not to go too far up in the air and he plunges to his death.
Percy soon afterwards dreams of Daedalus with his nephew Perdix. Daedalus kills Perdix by making him fall out the window. Athena sees this and punishes Daedalus by engraving a partridge into his skin.
Percy dreams of Maria di Angelo and Hades arguing about the safety of their children Bianca and Nico. Hades says that he should bring the kids to the Underworld, but Maria disagrees. Soon after, Maria is killed by Zeus' lightning bolt, and Hades immediately sends Nico and Bianca to the River Lethe then the Lotus Hotel and Casino.
Piper McLean dreams of the giants telling her to bring Jason Grace and Leo Valdez to Mount Diablo if she wants her father home safe. Lupa contacts Jason in his sleep to save the Wolf House. Hephaestus contacts Leo in his dreams but the transmission kept picking up Wheel of Fortune.
Percy's dreams are the only thing keeping him connected to his past at Camp Half-Blood. Annabeth appears to Percy in one dream, marking her only appearance in The Son of Neptune. She warns Percy to stay where he is, because Tyson and Mrs. O'Leary are coming to find him. Percy must leave however, because of the quest.
Percy's dreams about the Twins Giants, and the located and imprisonment of Nico di Angelo in Rome. He also has dreams with Gaea telling him that she would destroy Camp Half-Blood and Camp Jupiter once she has awoken, and that she would use him as her sacrifice along with Annabeth to reawaken her in August. Annabeth also has dreams of the Mark of Athena including about Arachne and the Statue.
Leo dreams that the Romans invasion of Camp Half-Blood ends in heavy loss on both sides and the giant army telling him he can't win. Jason dreams of Rachel's meeting with the Romans.
Jason has nightmares about his mother.
Magnus dreams numerous times of Loki on Naglfar as well as the death of Kvasir and Mr. Fierro kicking Alex out of the house. He also dreams of Odin warning him that he will have to face a creature that just eats him.
|Demigod Abilities:||ADHD | Ancient Greek | Aphrodite's Blessing | Ares' Blessing | Artemis' Blessing | Clear Sight | Dreams | Dyslexia | Latin|
|Object Manipulation:||Air | Anatomy | Atmosphere | Bones | Darkness | Dead | Earth | Electricity | Fears | Fire | Healing | Ice | Light | Love | Luck | Machines | Magic | Metals | Plants | Poison | Sleep | Sound | Temperature | Time | War | Water | Weapons | Youth|
|Other Abilities:||Alf Seidr | Charmspeak | Curse of Achilles | Empathy Link | Immunity | Mist Control | Prophecy | Rune Magic | Seasons Alteration | Shadow Travel | Shapeshifting | Telekinesis | Teleportation | Vocal Mimicry | Zoolingualism|
|Skills:||Archery | Greek Training | Legion Training | Weaving|