Birthday: April 1
Watanuki is a high school student whose life has been particularly challenging. Both his parents have passed away, leaving him to live alone, and he is constantly troubled by spirits that only he can see. This ability, along with the spirits' attraction to him due to his blood's unique scent, seems to be inherited.
One day, Watanuki makes a deal with Yuuko to work for her in exchange for granting his wish—to never see spirits again. This agreement marks the start of Watanuki's deeply involved part-time job, a fateful meeting with a quartet from Tsubasa: Reservoir Chronicle, and numerous "chance" occurrences which are not coincidental but rather "hitsuzen" (inevitable).
Watanuki is known for his volatile yet caring nature. His emotions tend to be exaggerated depending on who he interacts with. With Himawari, he becomes ecstatic, often jumping into the air while squealing her name. In contrast, he frequently expresses irritation towards Domeki, complete with various facial expressions, screaming, and arm movements, which Himawari likens to an angry cat. Apart from these two and Yuuko, Watanuki generally addresses others with formality and kindness.
A significant issue for Watanuki, especially early in the manga, is his lack of self-worth. He often saw no value in himself and would sacrifice his well-being to help others. For instance, he willingly gives up his right eye to the Spider’s Grudge to save Domeki without considering the emotional impact this might have on Domeki. This problem is brought to light when he tries to save the Zashiki-Warashi from the Joro-Gumo, and the spider matron criticizes him harshly for disregarding both his own worth and the feelings of those who care about him. Realizing the pain he has caused, Watanuki begins to see some value in himself. While he still tends to sacrifice himself for others, he now considers how his actions affect those around him.
Working as Yuuko's assistant significantly changes Watanuki's life. He not only cooks delicious meals, cleans diligently, and complains constantly, but also takes on very odd jobs and learns more about the occult world.
(Source: Wikipedia, xxxHolic Wikia)
