Not much is known about Dione's personality but based off of what little we see of her is that she doesn't like being made fun of and is easily irritated, shown by her expression when meeting the Jovian moons and when she got mad after Ganymede called her 'babe'. She is also rather observant, as she is the only one to notice that Titan's name is the only one that Saturn can properly pronounce since the later mispronounces her name as 'Diane".