Eufinley's covenant spirit. On the day they meet, Yardio quickly tries to make a covenant by kissing her, but gets hit. He is a laid back character in contrast to the more serious Eufinley. He also likes to fight, and his power level is above most four winged spirits. Unlike Corti, Yardio is more blatant in showing that he likes Eufinley. He also has both humanubic and belst form, with humanubic form mainly in anime and belst form primarily in the game.

(Source: Wikipedia)