Ichihara Yuko is the owner of a shop that can grant any wish, and the protagonist’s April 1st job partner. She has not revealed her real name in the comics, and calls herself Ichihara Yuko. In addition, there are different titles such as "Witch of Dimension", "Witch of Different Dimension", "Witch of the Far East", "Witch of Time and Space", etc. Possess the ability to travel through dimensions and time. As a person who can fulfill any wish of a person, she is naturally very clear about things in the other world, and she naturally has a certain amount of magic power (judging from the ability to create gods from another dimension, her magic power is quite high). Yuko's symbol is the butterfly. Yuko used butterflies as monograms and also used them to send messages. Yuko is a gourmet who likes to drink different kinds of wine, from Japanese wine to Western wine, and she enjoys all kinds of wine. She is very afraid of heat and feels weak in the hot summer; but taking a bath will make her feel refreshed immediately. In addition, Yuko is the only woman recognized by the great magician Kuro Rido in Cardcaptor Sakura (Fei Wang's words). However, if Yuko is not entrusted with fulfilling her wish, she cannot interfere with the affairs of other worlds. As for Gu Luo (Cullo), Yuko hates having anything to do with him. She describes Gu Luo (Cu Luo) as a "sinister magician with glasses" and "I think I have a relationship with that guy with glasses...a bit involved." In fact, she and Kuro have been competing with Rido, the flying king in the wings, for a long time, and created the Mokonas for this purpose. According to the content of the xxxholic181 painting, Yuko is trapped in stagnant time due to the content of her wish. Died before being born on April 1st.