Anastasia’s acquaintance demands to call her Assey. Sorry, dear, but Asay or Masay let your loved ones call you, and for me you will always be Nastya, because before Anastasia Sergeevna, from the point of view of my status, you have not yet grown up!

What was it now at all? A very fat troll or a person who recently arrived from another planet? Each name has a few generally accepted reductive literary forms. If you only know "Nasty"... Well, even Turgenev, read what, be enlightened. Asya and Nastya are two equal reductive variants of Anastasia. And if you’re so dumb that you can’t understand it, in the place of that Anastasia, I would eventually have stopped reacting to some nausea, but only to Anastasia (because the incomprehensible defect of speech doesn’t allow you to call her Assy).