Long before, in the first two seasons, Motsuki was originally a normal moth. She was first identified in "Moon Madness," as one of Luna Girl's moths.

After helping Luna Girl steal the harvest Moon Crystal from PJ Masks Headquarters' vault, Luna Girl decided to promote her to her new henchman, gave her new powers using the Luna Wand which changed her appearance, and gave her a name.

Eventually in "Moth on the Moon," Motsuki decided to go to the Moon to become Luna Girl's new sister by forming a strange Moon Crystal in a cave to hibernate, fueled by negative energy, to hatch her into a humanoid moth.