I think ,as the title says, your character should be able to have an age, younger or older. It determines your character's size (but no hitbox changes!), and NPCs talk to you differently. If your character is under 18, they die like the angler, saying you "left" and no gore is provided. Maybe NPCs look down on you as a young character and respect you as an old one, which could add a bit of challenge. Maybe the Party Girl could like young characters and dislike old!