Zimnur desired to get this goal of his at all costs. With all the lies and the dirty work, sure Lumi was attributing a lot of the efforts, but wasn't that the nature of a Demon? Grant the mortals their power so that they could secure their desires? She figured that although this means work more groundwork than she enjoyed, it gave her the experience to be more grander later. She was only now cultivating the skill to hold her side of bargains and deals and she was enjoying this kind of exchange. More so she was learning the means of aiding one build power, especially the enriching experience of having a hand in the corrupted kind, so that she could better understand the kind of ruin certain Demons favor.
Things she never cared to entertain as a Daemon, she was still grounded in her culture then. And though such things may not have yet left her, she was still excited to explore.