Talas (/'tæləs/ TAL-əs; oʀᴛʜoᴅox: T) is the larger and more distant of Iær's two moons. It follows a retrograde orbit, and shadow appears to move from left to right when viewed from Iær; it rises in the west and sets in the east. It has a less dense composition than Luca; this, in addition to its outer position, results in significantly more and larger impact craters on its surface. The relative positions and sizes of Talas and Luca result in similar apparent magnitude—it was believed in the Last Era (and still is in some quarters) that they are of the same size.

Talas is of great importance to the religions of Iær. Followers of The Sanctum, especially the educated populace, recognize that Talas is larger and more distant than Luca rather than identical; advancements in telescope technology have removed any doubt, however adherents to Nabi Kii still refute this fact.