Dark Yashiro is a Mirage that transformed into a warped doppelgänger of Yashiro Tsurugi after being exposed to a Dragonstone shard, as well as the residual essence of Yashiro's Carnage Form. Believing himself to be the true Yashiro, he holds a concert in Illusory Daitou TV, and Itsuki's party puts a stop to him in order to recover the piece of the Dragonstone in his possession.
Though they are physically near identical, Dark Yashiro's personality deviates from the real Yashiro's in a number of ways. One which Yashiro finds appalling in particular is Dark Yashiro's tendency to use words and phrases like "ta-ta" in his speech, which the real Yashiro would never use.
