Most people know Poison Ivy. She’s a respectably major Batman villain. Nosos is based on her to some degree, but balances out with her mythical namesake, too.
Where Ivy has to grow everything chemically, Nosos just does it. In mythology, Nosos is one of the Keres and a guardian of the Underworld. Nosos means disease, so naturally, she controls anything poisonous no matter how slight. This puts Dream Angel’s friend and mentor Breezer at risk as he is slightly toxic much like the real-world toads he’s based on.
If Ivy and Nosos ever got together, heroes of both worlds would be in an awful lot of trouble. The only one able to resist Nosos’s poisons is Teikou no Senshi and this regularly annoys Nosos. Of course, if you can’t kill them one way, might as well keep them out of the way, right? That’s Nosos’s attitude toward Teikou no Senshi. She’ll target her and hold her down with vines or something similar so she can’t go help her friends. Then she’ll continue fighting the other heroes.
Of course, all I’ve revealed so far is commonplace. Here’s something not so common: she’s the one who forced Jake’s retirement. A crushing blow with some poison attached that came dangerously close to killing him caused doctors to encourage his retirement for fear his body couldn’t withstand regular matches. Despite this, he still does exhibition matches from time to time.
She was also involved in the murder of Akasha’s family. If you were to ask her, she wouldn’t call it murder, she’d call it population control. She has a very cold, calculating nature and if she had her way, animals would be in zoos, not in the wild.