Gwyndolin is Gwyn's youngest child and the only god who still remains in Anor Londo. Born with an affinity of the moon, he was raised as a daughter and has a feminine appearance as a result.
He has created an illusion of his sister Gwynevere and all the guardian sentinels in the city's palace. His duty as a god is to execute sinners, and is helped by his followers with the covenant of the Blade of the Darkmoon. He guards his father's honorary tomb in Anor Londo.
The description of his Crown of the Dark Sun reads:
Crown of the Dark Sun Gwyndolin, protector of the forsaken city of Anor Londo.
This crown of the gods demands faith immeasurable of its wearer, but it is imbued with Darkmoon power that enhances all magic.
The image of the sun manifests Gwyndolin's deep adoration of the sun.