Many kinds of extraplanar beings can infuse humanoids’ bloodlines, whether as a side effect of powerful magic or the result of a tryst; those in whom extraplanar traits surface strongly are known as planar scions. Aasimars and tieflings, the mortal offspring of celestials and fiends, respectively, are the most common of these. Though planar scions resemble their humanoid kin, their appearance and demeanor bear supernatural touches. Tieflings might have horns, vestigial wings, or cloven hooves, while aasimars may have glowing eyes or a metallic sheen to their hair and skin.
Because of their innate curiosity, humans are more likely to dally with outsiders, and as a consequence, a significant percentage of planar scions living are descended from humans. However, because humans are far less populous than in ancient eras, planar scions descended from other humanoid races are now far more numerous.
A planar scion might pass for a member of the humanoid parent’s species, or the scion’s otherworldly features could make their origin obvious to those who are familiar with the species’ normal characteristics.
Those whose outsider blood is evident still find acceptance in most major settlements, where diverse beings coexist in peace. On the hub of interspecies relations, few people bat an eye when they meet an aasimar or tiefling.
Planar scions are often outliers in their community, either put on a pedestal or ostracized because of their ancestry. The potent blood that courses through the veins of aasimars and tieflings also makes them ambitious; many choose a dangerous but rewarding profession, such as explorer, mercenary, spy, or pilot.