Desktop Waifu Guide: Screen Pet, AI Assistant, or Dedicated 3D Companion?

Sometimes you do not want another character app that disappears the moment you close a tab. You want the character to remain visible while you work, play, draw, or leave music running in the background. That desire is what turns a general digital waifu into a desktop waifu. The term covers three quite different experiences. A screen pet adds an animated presence to your monitor. An AI desktop assistant adds conversation and context. A dedicated 3D companion gives the character a separate place in your physical setup. The right choice depends less on which one sounds most human and more on the kind of presence, interaction, setup, privacy, and cost you are comfortable with.