Other Characters/Jötnar

Hati Hróðvitnisson and Sköll
Hati and Sköll are the offspring of Fenrir and a Jötunn woman. They first appeared in Volume 7, when Loki summoned them to assist him in his battle to kill Odin after Fenrir was trapped by the chains of Glepnir. One of them fought against Vali's Team while the other faced the Gremory group and took the opportunity to free their father from the chains. Eventually they were both killed when Saji in his Vritra Promotion trapped them in his black flames while negating their abilities, leaving the opportunity for everyone to finish them.

Angrboða
Angrboða was a Jötunn from Jötunheimr (Jotunheim) who birth three of Loki's children; Fenrir, Midgardsormr and Hel.

Fenrir's Mate
Fenrir's Mate was the Giantess who lived Járnviðr (a forest located east of Midgard) that Loki had transformed into a wolf to mate with his son to birth his two grandsons; Hati and Sköll.