Shōta Kadomori occupies the role of eldest son in the Kadomori family and serves as its Guardian of Kyoto. His younger brother Taiju Kadomori addresses him by the nickname "Matsu." Professionally, Shōta operates within the family's spell tag development room, where he engineers new spell tags and hones their combat and protective capabilities. His battle expertise centers on magic that immobilizes or restricts opponents. A recognized behavioral pattern involves his tendency to deliver prolonged preaching sessions, often extending for hours without pause once initiated. His given name "Shōta" merges the kanji for "pine/fir tree" (松) and "thick/great" (太), while his surname "Kadomori" (門守) translates to "gatekeeper," aligning with the family's hereditary function.