Yooko likes to smoke with a long pipe. She has a good drinking capacity and loves food. She will become quite childish in front of food and wine. She likes the cooking made on April 1st very much and often praises April 1st for her excellent craftsmanship~ Yuko and the creator of "Curo Brand" Crowley has a good relationship with Rideau, but calls Crowley a "sinister glasses guy". She is the only woman that Kuro recognizes as possessing magic power (Fei Wang's words).

Yooko is the main reason why April 1st changes (both physically and mentally). In addition to the fortune teller Granny, even Thunder Beast also thinks that April 1st has changed. Moreover, Raiju even said that Yuko actually hurts April 1st. And the fortune teller also said that Yuko also changed because of her encounter with April 1st.

In fact, Yuko was already dead, and Kuro's wish not to let Yuko die due to his powerful magic caused Yuko's time to stop, and she was able to survive. She always fulfills people's wishes, which is the price for reincarnating the clone Sakura.

Starting from the 180th chapter of the xxxHolic manga, Miss Yuko disappeared in front of Jun Xun on April 1st because "time" had begun to pass. She has never appeared, but she once met Hyakumu Kihara in a dream. I met and asked Mr. Yao to take care of April 1st. And she is worthy of being the soul sister of the whole story. After she disappeared, the time of the story also jumped significantly. It has developed to 10 years later in just a few episodes. And Yuko never appeared again in the comic version.

In the latest xxxHolic·Cage OVA, the female client said to April 1st in Yuuko's tone (the same voice actor as Yuuko is Sayaka Ohara): "I'm back, April 1st." On April 1st, after not seeing Miss Yuko for a long time, I was so moved that I couldn't help but say: "Welcome back, Miss Yuko." This is also the price paid by the client, which shows how deeply I miss Yuko on April 1st.

(In the original comic, Yuko did not appear again. He told April 1st through a dream he had long ago that he was powerful enough to walk out of the store)