Every now and then she says "error" or "rebooting". She acts less like a human and more of a cordial, smiling robot. Her job is to assign quests to Mondstadt's adventurers and provide intelligence support. The Adventurers' Guild is open for business all year round. There are different Katherynes in each nation in Teyvat. It is hinted that she is an artificial being made from Snezhnaya. She is an NPC from Genshin Impact. She a keyhole at the back of her neck.