Li Gan

Ri Gan is the Sage of Mirror Lake.

Synopsis
Although he is a mage, his interest lies on magical research especially a global-level magic. His knowledge is vast, one of a few people who recognised that Elder Tale has been altered by magic three times in the history, and he named it World Fraction. He found in the archive that Shiroe first appeared 98 years ago and believe that he must be an archmage based on the frequency and activeness, leading him to contact the guild master of Log Horizon directly to discuss World Fraction and Spirit Theory.