[X]Lamenting Cero. Nemo's Cero has always had a peculiar gray color, wisp-like look and strange sound, but this effect actually turns this into a meaningful combat advantage. When the energy of your Cero scatters after firing, it creates phantomatic vision, smoke- or mist-like, just figurative enough to imagine real shapes in them, as well as a distorted, mournful chorus in the area of firing. This allows you to use your own Cero as a smokescreen, concealing your movement in the visions and drowning your sounds in the weeping.
[X]There are ruins in Hueco Mundo, of civilizations gone before. Cirucci was once a princess in her tower. She can't go back there without being accused of desertion, but she can send you. Go back to where she once lived and find souvenirs for her, and perhaps more.
Would like Living Cero more, but Lamenting fits Nemo's style better.