Kimihiro Watanuki is an orphan whose parents died in his youth, granting him spirit-sight through his bloodline. His name, meaning "April 1st," aligns with his birthday and a disease-warding tradition. His existence anchors to Syaoran Li from *Tsubasa: Reservoir Chronicle*, created to fill the void when Syaoran reversed time; this makes him Sakura and Syaoran Li’s son in an altered timeline. A fabricated true name shields him from exploitation by Fei Wong Reed. Watanuki has short black hair, blue eyes, and fair skin, typically clad in a black school uniform and glasses. After sacrificing his right eye to a spider’s grudge curse, its iris turns milky grey. He later shares half of Shizuka Doumeki’s right eye’s sight, resulting in heterochromia: his left eye stays blue, his right shifts to gold or brown. As heir to Yuko Ichihara’s wish-granting shop, he dons her extravagant kimonos and eventually wears glasses resembling Clow Reed’s, underscoring a noted familial resemblance. His personality transforms dramatically. Initially volatile and easily angered—especially around Doumeki—he shows exaggerated devotion to his crush, Himawari Kunogi. Low self-esteem drives him to self-sacrifice, ignoring the pain it causes. Losing an eye and distancing from Himawari to protect her from innate misfortune deepens his seriousness and introspection. His bond with Doumeki evolves into mutual reliance. After Yuko’s disappearance, he inherits her role, adopting her pipe-smoking and cryptic speech. This refines him into a calmer, more reserved figure, though his loyalty to loved ones remains absolute. Key events define his journey: To stop seeing spirits, he works part-time at Yuko’s shop, handling domestic and supernatural duties. Bonding with a spirit during the Mayuko arc brings severe illness, teaching him self-sacrifice’s consequences. In the spider’s grudge incident, he loses his right eye saving Doumeki from a curse, later sharing Doumeki’s sight—an act that cements their bond and teaches Watanuki self-worth. The Dream arc exposes his erased memories, traded as payment to help gather Sakura’s feathers across dimensions; Mokona’s earring safeguards these memories. A near-fatal fall from a school window, caused by Himawari’s misfortune, is reversed when Doumeki and Himawari absorb his injuries through a wish. His origin as Syaoran’s alternate self is pivotal: Created when Syaoran rewound time, he fills the resulting void. His parents died protecting him, and his unstable existence initially drew spirits attuned to his subconscious wish to vanish. After Yuko’s death, he inherits her shop, paying with his aging process—becoming ageless—to await her return indefinitely. He grants wishes but often sets overly generous terms, injuring his own body to balance the cost. Though gaining the power to leave the shop after a century, he chooses to stay, continuing Yuko’s work. In later years, Watanuki maintains relationships with Doumeki and his descendants, who aid the shop. Himawari marries another but visits annually on his birthday, sustaining their platonic bond. Kohane Tsuyuri, his mentee, becomes engaged to Doumeki. His existence persists through his resolve to reunite with Yuko, blending resilience and melancholy as he upholds the shop’s legacy through immortality.