Wandered again in various worlds and I ended here(via the Stone World). I discovered that the "smoking lady" -I always felt that is was more of a genderless robot wearing a belt and holding a thunderbolt, by the way- turns into something totally different when the Marginal effect is equipped. I could also lure the small robot with red eyes with the same effect.
The first screenshot shows the normal NPC; in the second, the same NPC all transformed and the blue robot lured from its position (I did try the Marginal effect in the Digital Hand Hub by the way, and it did nothing).