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As Sailor Pluto, she guarded the Space-Time Door, and she originally could not leave her post, which left her very lonely. However, Neo Queen Serenity allowed her to leave her post to help the other Senshi of the Outer Solar System during the events of the S season, and she was reincarnated as an adult in the present time during the Death Busters arc, where she took on the identity of Setsuna Meiou, a K.O. University student studying physics.
Setsuna dreamed of being a designer one day. She was good friends with Chibiusa and Diana, and was also very close to Hotaru Tomoe after the end of the Death Busters crisis. Setsuna became part of an adoptive family with Haruka, Michiru, and Hotaru when they took up residence together.
Setsuna retains the same appearance as she did in her original manga depiction.
Sailor Moon S
Sailor Moon SuperS
Setsuna mostly appears in the Sailor Moon SuperS movie as Sailor Pluto, though she appears untransformed briefly.
Sailor Moon Sailor Stars
Setsuna's name means "moment" or "momentary" while Meiou means "dark king."
- In the anime, Setsuna is the only Solar System Sailor Senshi to invent a civilian identity, rather than having one before becoming a Sailor Senshi. This differs from the manga, where she was reincarnated after dying from stopping time in the Black Moon arc, and lost her memories, like the other Senshi did at the start of the series.
- In the original English dub, Setsuna was renamed "Trista". The name "Trista" is derived the Latin triste, meaning "sad", which fits Setsuna's personality.
- In 1998, Irwin released a line of Senshi of the Outer Solar System dolls well before Sailor Moon S aired in North America. On the boxes of the Sailor Pluto dolls, she was given the civilian name "Celia."