Zero agreed to give up all her souls so that Lea would have a better chance of creating a true masterpiece.
She was not sorry to lose all the souls she had collected over the few days of battle because Zero was genuinely grateful to Wain.
'He said we would have been able to get out of that lab on our own that day, but we weren't. The mutants would have seriously wounded us, and the last two monsters in the pods were formidable foes. That black wolf could have turned us to stone, and then we no longer had a chance to survive.' Thought Zero approaching Lea.
Zero reached forward, palm up, and the next moment the palm glowed brightly. Zero mentally moved souls from her inventory into the real world.
Hundreds of white souls and dozens of blue ones flew out of her palm. They swirled around her like bright lanterns capable of illuminating even the darkest road. Then these souls headed toward Lea and hovered above her.