Guardian Soul

Guardian Soul is a Keyblade in Kingdom Hearts II which is given to Sora by Auron after he defeats Hades and restores Auron's will. Its name comes from Auron being a Guardian of Yuna's in Final Fantasy X.

Appearance
The blade is similar to Auron's strongest weapon in Final Fantasy X, the Masamune. The hilt guard is a strange face while the token is Auron's jug of sake. In addition, the sparks that appear when the blade is used to strike as per other Keyblades are Yevon symbols, a reference to the main plot of Final Fantasy X. This is, however, ironic, as Auron was instrumental in revealing the truth of the religion.