A dedicated researcher and academic, Leosin Erlanthar has devoted his life to studying the draconic pantheon and their followers. Leosin found himself at odds with the more fanatical followers, the Cult of the Dragon when trying to discover their intentions regarding a long dead deity, Tiamat, and their plan to bring her back to the material plane. He now works with many organizations who work against the Cult, but also found unexpected allies in the form of the Menagerie of Might, the group who rescued him from the clutches of the Cult outside of Greenest. He continues to research the Cult and their activities while organizing against them.