 Haru first names him "Sabutaro" which Let prefers to call him.In the "Fairy Tail" series, Plue is revised as a celestial spirit who serves as a pet for Lucy Heartfilia but prefers to be summoned on Tuesdays, Wednesdays, and Thursdays.In chapter 71 of "Fairy Tail", Happy pulls a prank on Lucy by speaking as if he were Plue.