She also resents the rest of the guild Ainz Ooal Gown for leaving Momonga alone. In a novel chapter that came with one of the manga volumes (i.e. not spoilers here) she you see her tear down the Ainz banner and put up that Momonga one, and she declares her hatred for the ones who abandoned Nazarick.
If anyone else from Nazarick, even her creator Tabula Smaragdina, were to have made it to the new world, she would try to kill them because she feels that after they abandoned the guild, only Ainz deserves to rule Nazarick.