Tiefling
Source Pathfinder Advanced Player's Guide
You descend from fiends or bear the mark of the fiendish realms, manifesting as some unusual feature that belies your heritage, such as horns or a tail. You gain the tiefling trait, in addition to the traits from your ancestry. You also gain Low-Light Vision, or you gain Darkvision if your ancestry already has low-light vision. You can choose from tiefling feats and feats from your ancestry whenever you gain an ancestry feat.