After rescuing her from Hollow Bastion in Kingdom Hearts, Kairi gives him the charm for luck in the Secret Waterway in Traverse Town.
The Oathkeeper is formed when Sora uses Kairi's Wayfinder as a Keychain. Fundamentally, the Oathkeeper is symbolic of Sora's memories of Kairi. It also appears as half of Roxas’s dual set of Keyblades alongside the Oblivion, and was transformed from his original Kingdom Key after he absorbed Xion. 'Oath's Charm') is a Keychain for Sora's Keyblade which appears in Kingdom Hearts, Kingdom Hearts Final Mix, Kingdom Hearts: Chain of Memories, Kingdom Hearts Re:Chain of Memories, Kingdom Hearts II, Kingdom Hearts II Final Mix, Kingdom Hearts 358/2 Days, and Kingdom Hearts Re:coded. The Oathkeeper ( 約束のお守り, Yakusoku no Omamori ?, lit.
