Wayfinder

A Wayfinder is a star-shaped lucky charm that is used to provide luck to travelers. They are traditionally woven from seashells, but t here have been several imitations made from other materials throughout the Kingdom Hearts series.

In Kingdom Hearts Birth By Sleep, Aqua created three Wayfinders for Ventus, Terra and herself before she and Terra had the Mark of Mastery Exam.

In Kingdom Hearts, Kairi creates a Wayfinder to bring her, Sora, and Riku good luck before they left the Destiny Islands. After being reunited, Kairi lent her Wayfinder to Sora, and Sora promised to return it to her.