「最善を尽くしても効果があるかどうかはわかりませんが、最善を尽くさなければ効果が得られないことは確かです。」/"We don't know if trying our best will help, but we do know, that if we don't endeavour our best, it won't help for sure!"-Eru Chitanda

-Nadeko Sengoku (千石 撫子, Sengoku Nadeko) is Tsukihi Araragi's childhood friend and an acquaintance of Tsukihi's brother Koyomi Araragi. She was a victim of a painful curse that caused an invisible snake to coil around her and manifest scars that resemble snake scales. During her attempts to cure herself of the curse, she met Koyomi once again after not seeing him for a long time.
She is the narrator of Otorimonogatari, Nademonogatari, and an arc in Yoimonogatari. She is the titular protagonist of three main arcs: Nadeko Snake, Nadeko Medusa, and Nadeko Draw, and three minor arcs: Nadeko Pool, Nadeko Mirror, and Kimi to Nadekko!.

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