In the classic 90s anime, Sailor Pluto was commissioned by Queen Serenity (mom of Princess Serenity [Sailor Moon's ancient incarnation]) to guard the Space-Time Door, which she is shown doing in the R season, but she is later allowed to leave, and thus shows up with a civilian form (Setsuna) in the S season. One of the 3 rules given by Queen Serenity was that she could not leave her post at the door. She does go on to break all of the rules, but according to Wikipedia, Neo-Queen Serenity (future Sailor Moon) gives her permission to leave her post.
But why? Does the door not need to be guarded anymore? Is it temporary leave and she will need to return eventually, or is it permanent leave?
In the manga, Sailor Pluto's guarding location might be located outside of time (or is it located inside of the palace in 30th century Crystal Tokyo?), so perhaps she could technically be there as well as have a 20th century civilian incarnation that is at a point inside of time, so she could apparently continue to guard the door while she shows up in S, the SuperS movie, and Sailor Stars (but this is unrelated to why Neo Queen Serenity would excuse her from her post in the classic anime).
In the Sailor Moon Crystal canon, is Sailor Pluto able to and/or permitted to leave her post at the door? Is this aspect identical to the manga version?