Othinus (オティヌス(オーディン) Otinusu (Ōdin)) is a character introduced in Shinyaku Toaru Majutsu no Index. She is a Magic God, the pinnacle of the Magic Side, and was the leader of GREMLIN and the primary antagonist of much of the early Shinyaku Toaru Majutsu no Index, up until the 10th volume.