The so-called "Taiji Taro Mud" that has defected to the Feast Fairy Altar is actually an undercover agent sent by Izumi, the God of Food, who is the owner of the Air Sangha.
In the Food Words game, Taiji Taro Nai is positioned as a support, in the battle for the party food souls to remove unfavorable status, to enhance the attack and defense, to help the party team to win the battle.