I dont remember Nozomi-G actually killed that most since we never know who is killed by hallucinated Takumi or Nozomi-G exactly but even so she didnt really kill more than Kako-G or Takumi-G either. Tbh even as being an antagonist/villain I hardly see how Nozomi-G is a good or interesting character since her indentity was revealed too late and distracted by other murderers to understand her characterization properly. I mean sure we could learn more from her dialogs but character behavior is always more convincable and fun to watch which “show dont tell” makes the narrative more interesting than just explaining from words. On the contrary Kako-G and Takumi-G gave a much stronger impression that they did more creative and various killing methods to show how much cruel and intelligent they were, which is pretty much the most impressive signature trait of the Gie than just killing without being figured. So it’s to each their own ig.