Sailor Pluto first appears in the second major story arc, and her civilian form is not shown until the third. She is unique among all the characters in that she is stationed at the Door of Space-Time, with the specific duty of forbidding anyone to pass through it without permission. She possesses powers that are associated to time, space, the underworld, and darkness. Pluto is depicted as older and more sophisticated than the other Sailor Soldiers. Her personality has been described as distant and somewhat lonely, however she does displays warmth and affection for Chibiusa.