Half of [[Roxas]]’s dual set of [[Keyblade]]s alongside the [[Oblivion (kingdom hearts)|Oblivion]], and was transformed from his original Kingdom Key after he absorbed Xion. Fundamentally, the Oathkeeper is symbolic of Sora's memories of [[kairi (kingdom hearts)|Kairi]].

[spoiler]The Oathkeeper is formed when Sora uses Kairi's Wayfinder as a Keychain. After rescuing her from Hollow Bastion in Kingdom Hearts, Kairi gives him the charm for luck in the Secret Waterway in Traverse Town.[/Spoiler]
oathkeeper