" Sodachi Oikura  "

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Sodachi Oikura is a third year student of Naoetsu Private High School and a childhood friend of Koyomi Araragi. Due to many unfortunate situations, she has a bitter personality and hates Koyomi with a burning passion.
Sodachi is the narrator of an arc in Orokamonogatari and the titular protagonist of three main arcs: Sodachi Riddle, Sodachi Lost, and Sodachi Fiasco, and of one minor arc: Sodachi Mirror.