Ru-shi Feat 1
Source Pathfinder Lost Omens: Ancestry Guide
You were born to a jiang-shi, one of the so-called hopping vampires found most often in Tian-Xia. Your parent had a supernatural obsession with counting small objects, which manifests in you as a preternatural gift for linguistics and mathematics. You are trained in Society and gain the Eye For Numbers skill feat. If you would automatically become trained in Society (from your background or class, for example), you instead become trained in a skill of your choice.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
DhampirA creature with this trait is a member of the dhampir ancestry. These humanoids are the mortal offspring of vampires and members of other ancestries.