Katheryne is the receptionist for the Adventurers' Guild headquarters located in each of Teyvat's seven nations. She assigns quests for guild members and the Traveler, as well as intel about incidents occurring in the area. Multiple, identical Katherynes exist, all serving as the guild's receptionists, but they have independent wills and memories. It is highly implied that she may be an android or some kind of artificial being, based on her idle quotes and identical appearance regardless of location.