From RHJunior Comics Wiki
Imprinting is the term used for a goblin duplicating personality traits and knowledge from another person prior to hatching. A goblin will not take on all of a person's personality, only part of it, usually focussing on a single concept.
Traits that have been exhibited include: intelligence, hostility, negativity, machismo/"coolness", innocence/"inner child", creativity, hopes for the future, lessons of the past, scholarlyness, "warrior within", and nerdiness.
In the pre-retcon version of the webcomic, called Under the Lemon Tree, certain facts were stated that have not so far been repeated, changed, or made irrelevant in the currently posted version. These include: