During its first incarnation the Daystar Clinic was positioned in the ruins of one of the city's several collapsed buildings, which required several and frequent makeshift repairs. After the Katsuki and the other Death Dealers forced all of the large scale criminal entities from the city the clinic, which had been destroyed during the fighting, was relocated to the abandoned hospital near the center of Kura-ku.
Initially Katsuki's management of the clinic revolve solely around providing medical care and pharmaceuticals to underground clientele, without questioning their allegiance or background. This would later be expanded when Katsuki weaponized the Cursed Seal Nutrient, and begun to sell the drug to enemies of Kirigakure.
Shortly before encountering Nōsei no Mikoto Katsuki began to provide information on mercenary work and other underground missions to customers, acting as a distributor in more ways than one. After clashing with other large criminal entities in the city the clinic began to provide basic medical care to the residents of Kura-ku. Furthermore, due to the influence of the her associates Katsuki's clinic became involved in a variety of additional objectives.