Ep. 4: Yotsugi Doll Part Four details mountain ascent, backstory, and confrontation with Teori

4

Koyomi and Yotsugi meet Ougi Oshino before climbing the mountain to rescue hostages. Yotsugi reveals her origin as an artificial shikigami created by Yozuru, Teori, Meme, and Deishu Kaiki under Izuko’s direction, explaining her choice to stay with Yozuru. She suggests sacrificing herself to Teori, but Koyomi refuses, proposing a decoy plan instead. At the shrine, Teori folds origami to count time, revealing a curse preventing him from walking on the ground. He suspects his role is manipulated by an unseen force and urges Koyomi to find Meme for balance. As time runs out, Teori prepares to fight, feeling used as a pawn. Yotsugi appears and kills Teori with her powers, shocking Koyomi. She claims this action preserves her monstrous nature and warns him not to become like her. The hostages are rescued, and Koyomi feels disgusted by the rift created by the incident. Later, Hitagi Senjougahara gives Koyomi chocolates for Valentine's Day, advising him to focus on the present. Yotsugi moves into the Araragi household, having been won by Tsukihi, to help reconcile with Koyomi until balance returns to the town.