Sodachi Oikura knows Nadeko Sengoku because Nadeko frequently visited the Araragi family home, where Sodachi was living as a refugee during her childhood.
Childhood Connections at the Araragi Residence
The relationship between Sodachi Oikura and Nadeko Sengoku originated during their early years, stemming from a unique living arrangement. At a young age, Sodachi was offered refuge in the home of Koyomi Araragi's parents, who were police officers. This situation meant Sodachi resided directly within the Araragi household for a period.
How Their Paths Crossed
During her time living with the Araragi family, Sodachi naturally interacted with the household's regular visitors and members. Among these frequent guests was Nadeko Sengoku, who often visited the Araragi home. It was through these consistent encounters that Sodachi and Nadeko met and became acquainted. This period also involved Sodachi interacting with Koyomi Araragi's younger sisters, Karen and Tsukihi, further embedding her into a shared social circle that included Nadeko. This early, shared environment laid the foundation for their connection, establishing their acquaintance from childhood.