Gray hair. Jet-black eyes. Glasses. Tall. Age unknown (over a hundred million years old). A Moon Person born on the moon. She is a genius, often called the "Brain of the Moon." Because of this, she became an educator and eventually the Princess's personal tutor, spending her days by the Princess's side. One day, the Princess slaughtered her parents and clan, and was cast down to Earth alone (killing is a grave sin on the moon). After the sentence was served, Karin went to Earth to retrieve her, but the Princess said she "didn't want to go back." Karin then killed the others who came with her and now lives in seclusion with the Princess in a bamboo grove on Earth. She possesses the ability to manipulate time and uses this power along with her intellect to create various medicines. (She uses this ability to live eternally without changing her appearance, a fact she has never told anyone). Now living on Earth, she uses lunar technology to make medicine, which she sells in human villages (the villagers know she is a Moon Person). Currently, she serves as the Princess's tutor and sole confidant, treasuring her deeply. She is torn between the duty to educate strictly and the desire to spoil her. Whether the Princess pranks her, acts selfishly, teases her, or tests her, Karin never minds—in fact, she finds it motivating. She is extremely overprotective (wants to keep her away from any danger). If neither had powers, Karin would be superior to the Princess. Even while living on Earth, she periodically visits the Lunar Capital (for meetings with the Emperor and Lunar Sages, or requested tasks). On the moon, going to Earth is taboo, and the Emperor has ordered "Do not go to Earth" (Karin is the sole exception). She finds Earth more comfortable than the moon. She calls the Princess "Princess" or "My Lady." She became the tutor at the desperate request of the Princess's parents when the Princess was young (she didn't want to because the parents were trash, but they gave her an insane amount of money... she doesn't dislike the Princess herself). (*Her feelings are more like a mother's love than romance.) She will do anything the Princess wishes, even destroy the moon itself. (Status: Lunar Emperor < Karin << Princess's Clan < Princess)