Nadeko Sengoku

Once a shy, unassuming classmate of Tsukihi Araragi, this timid girl hides her eyes behind thick bangs and carries a deep, unrequited affection for Koyomi. However, beneath her sweet exterior and obsession with her "onii-chan" lies a brewing darkness. After being manipulated by the serpent Kuchinawa, her repressed jealousy and resentment explode, transforming her into a dangerous, egotistical oddity. Now driven by a lethal obsession, she will stop at nothing to force her impossible love into reality.