User blog comment:B214/Question and Answers 6/@comment-39829421-20190619154426/@comment-2600:1700:14E1:4110:CCF0:76A5:7D88:C6F2-20190622145200

Maybe without the protection of god's system, their light powers become more corrupted(often said in fanfics) and they probably can't heal as fast as angels connected to heaven's system, hence why raynare probably stole asia's twilight healing, to not only be noticed by azazel and shemazai but to be helpful to the who grigori as well. That and she was most likely jealous of how the sacred gear wielding humans of the grigori, possibly mainly the slashdog team, i.e. tobio and vali, had more of azazel attention than her, a fellow fallen angel.