Yotsugi Ononoki is a key supporting character in the Monogatari Series, a supernatural mystery anime. She is a tsukumogami shikigami, formerly a human, who now serves as a familiar to Yozuru Kagenui. With her trademark deadpan expression and monotone speech, she frequently ends her sentences with 'I said with a posed look.' Yotsugi assists Koyomi Araragi and others in resolving oddity-related incidents, providing both comic relief and essential combat support throughout the series.