Nadeko Sengoku (千石 撫子)

Nadeko, a main character of the Monogatari Series, has been Tsukihi's friend since elementary school. She wears a waist pouch, casts her eyes downward, has bangs covering her eyes, has a shy personality, and can be easily amused. Koyomi played with her a lot whenever she visited his house after being invited by his sisters. She refers to Koyomi as Koyomi onii-chan and appears to have feelings for him.

Nadeko Snake Arc

She's quite protective of her hair (particularly her forelocks) thinking that it's her place to guard more than her panties. When she finally combed her forelocks aside in Nisemonogatari, Koyomi commented that she has a glare just like a serpent, foreshadowing the story of Nadeko Medusa.

Nadeko Medusa Arc

Koyomi Reverse Arc