Ollerus (オッレルス Orrerusu) is a character introduced in Toaru Majutsu no Index. He is an enigmatic fellow that once had the chance to become a Magic God, but has failed to do so. Still, as an incomplete Magic God he is one of the strongest characters in the series, and was once pursued by various magical organizations seeking his power and knowledge, but he has managed to elude all of them with ease.