Can someone remind me what is gnosis?

A super bad villain organization that has an unknown goal who has been doing bad things including trying to control Romi to get to Shin Nayun, releasing Malakian in dungeons (the monster vs Gidan), and destroying the country Jin guy is from (glasses guy from hunter management). The blonde lady is a part of it and she’s interested in our precious chick because she’s known to love experimenting on talented kids

Thank you