Annabeth's Yankees Baseball Cap is a magical item that had the ability to make the person who wears it invisible. As of The Mark of Athena, the magic cap had its magical properties removed after Annabeth Chase got into an argument with Minerva. However since The Staff of Serapis, The cap got back its magical properties.
History
Annabeth's mother and the goddess of wisdom, Athena, gave it to her for her twelfth birthday. This is one of the only gifts her mother has given her.
Use
The cap is similar to Hades' Helm of Darkness, however it does not have any fear inducing properties, it cannot change its shape, and it does not make the wearer intangible. It has had many life-saving uses, quite notably helping Percy Jackson escape from the Furies on a bus in The Lightning Thief. Annabeth had used the cap to defeat the Laistrygonians, when they attacked Percy and Tyson and to trick Polyphemus in The Sea of Monsters, escape from Mount Saint Helens in The Battle of the Labyrinth and fight alongside Percy in The Last Olympian. So far, Percy is the only known demigod other than Annabeth who has used this cap.
In battle, or in any circumstance as a demigod, the hat is very useful. When worn, it makes the user and any item they're holding invisible. That in and of itself would make it very powerful, as its usefulness of stealth is an important and useful factor in battle and ingenuity on Annabeth's part makes it invaluable. Unfortunately the cap lost its magic in The Mark of Athena, after Annabeth get in an argument with her mother's Roman form.
Users
- Annabeth Chase – The cap belongs to Annabeth, and was given to her by her mother Athena. The cap helped cause many victories and success in Annabeth's and Percy's quests.
- Percy Jackson – When Annabeth was abducted in The Titan's Curse, Percy kept the cap and used it to eavesdrop on Atlas and Luke. Six months later, he used it to sneak up on Kronos before he could reform. He also used it briefly in The Lightning Thief and The Battle of the Labyrinth.
Trivia
- In ancient myths, Athena gave Perseus a helmet that turned him invisible. During the series, Annabeth, a daughter of Athena, has offered to let Percy Jackson use it on multiple occasions.
- In her official picture, Annabeth has the hat on and is seen starting to turn invisible from the bottom up.
- Annabeth does not let anyone else other than Percy use the hat.