| Spoiler warning!
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| Was the mysterious and carefree shop owner for many years before Watanuki took over. She is often associated with the butterfly. |
| Is the current owner of the shop. He used to work for Yuko Ichihara as a helper before she died and he decided to take over the shop. He is often associated with a bird. |
| Is Watanuki's closest friend even though they fight often. He has accompanied Watanuki on all his hardships throughout his life and remains a loyal friend. |
| Was Watanuki's primary love interest in xxxHolic though the relationship dissapeared in xxxHolic RO when Watanuki became the new shop owner. |
| Like Watanuki, Kohane can see spirits. She is a shy but caring girl and is like a sister to Watanuki. |
