I'm under the impression the only thing you can't do in Eternum is change what you look like. How you see yourself IRL is how you look in the game, Right? So what happens if a guy is missing a leg or both legs and plays the game? Will the game gift him cyborg legs?
(Slight spoilers.)
And one other question, at the start of the game, the main character asks about sex in the game. And NPCs can't do it, only consenting players. So what was the Eternum Lady doing when she made 3 of her? Just joking around to illustrate her point?