Originally, one of the female jötunn who had lived inside of Járnviðr, a forest located east of Midgard before being transformed into a wolf by Loki, then had her breed with Fenrir, which gave birth to his grandsons, Sköll and Hati.
Sinmara (シンモラ, Shinmora) is the wife of Surtr and the keeper of his divine sword Lævateinn. She participated with Surtr in the Azazel Cup as his Queen for his team called Team Black and during the during against Team Spear of the Heavenly Emperor, she was captured by Georg’s Dimension Lost barrier.
Hrungnir (フルングニル, Furunguniru) is a member of Surtr’s team that serves as the Rook of Team Black. He fights his opponents with his gargantuan spear and he managed to weaken Cao Cao’s team.
Útgarða-Loki (ウートガルザ・ロキ, Ūtogaruza roki) is one of the members of Surtr’s team that serves as the Bishop of Team Black. He is a illusion user who was defeated in the battle against Team Spear of the Heavenly Emperor.
Hræsvelgr (フレースヴェルグ, Furēsuvu~erugu) is one of the members of Surtr’s team that serves as the Knight of Team Black. He is a giant with the head and wings of a hawk who specializes wind magic.