Thorin is father of Wallace and Grimm Hammerfall

He was the head of the Hammerfall family until being taken over by the Second Horn Piece.

While under the control of the Second Horn Piece, Thorin used the Spider Soul Dagger to kill his friend Luthor Quartzbeard and seal his soul within the dagger.

Since the incident with the Horn, Thorin has reclused himself away and left his sons to run the Hammerfall Clan.