| Dark Sirus |
|Sera Myu:||Pretty Soldier Sailor Moon ~ 10th Anniversary Festival - Sanctuary of Love|
"Dark Sirius" is a planet that was the 3rd planet of a system in Orion. However, the planet had no sun and because of this, a man named Dark Nibiru formed a group and went to Earth to take the Silver Crystal so that it could be their sun.
- The planet never appeared in the musicals, but it was mentioned a couple of times and it was very important to the plot of the musical it was mentioned in.
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