Musicals
The Starlights are featured in several of the Sailor Moon musicals (Sailor Stars, Eien Densetsu, and their revised editions, plus Ryuusei Densetsu, and Kakyuu-Ouhi Kourin). While played by women, it is meant to be ambiguous as to whether or not they take on male forms (like in the anime) or are cross-dressers (like in the manga), though their personalities are clearly from the anime. However, many cast members regard the original Three Lights during Anza Ooyama's stage to have personalities which are different than the original works., and scenes starring them are referred to as "Confusion Scenes" In one Fankan the Trio is even referred to as "our Beloved best in the Galaxy Singing Dancing Miracle Super Monkey Guys" Seiya is portrayed as being eager to assist the Earth's Senshi in their battle with Galaxia, while Yaten and Taiki are more reluctant. However, Yaten is portrayed as being less cynical and more airheaded, often behaving similar to Minako Aino. Taiki is also more of a womanizer, several times hitting on Michiru by telling her that he is a big fan of her music, to which Yaten says, "You say that to every girl you meet!" Seiya is also explicitly referred to as "Leader" by the other two.
In their songs, the Starlights refer to themselves as "Soldiers of the Stars."
Of the pairings implied and explicit in the anime, only Seiya and Usagi's relationship is at all presented in the musicals. Among the musicals with Starlights, only Eien Densetsu includes Usagi and Seiya's interactions as a romantic subplot similar to the Sailor Stars anime. Sailor Moon Sailor Stars touches on a special bond between Seiya and Usagi, but it is not as deeply explored. In Ryuusei Densetsu, Mamoru is not killed by Galaxia, so there is no romantic interplay between Usagi and Seiya (though Usagi does make Mamoru jealous several times by saying Seiya is better looking than him).
In all musicals, Minako and the other Guardian Senshi are fans of the Three Lights, as in the anime. The Outer Senshi are still suspicious of the Starlights, though the Haruka and Seiya rivalry is generally absent. In two of the plays, Haruka and Michiru are the first to realize that the Three Lights are also Senshi. In all three musicals, it is the Starlights who tell the other Senshi who they really are - the Starlights always seem to know the civilian identities of the Guardians and Outers without needing to be told, though Sailor Moon's ownership of the Silver Crystal is sometimes revealed by Kakyuu.
After the Starlights find Princess Kakyuu (only in Eien Densetsu, its revised edition, and Kakyuu-Ouhi Kourin), they travel with the others to the Galaxy Cauldron as in the manga.
As in the anime, the Starlights are never killed by Galaxia and help protect Sailor Moon after the others are (temporarily) destroyed. Unlike the manga and anime, the other Senshi do not always die fighting Galaxia and when they do they are always resurrected before the final battle. In some versions of the musicals, the Starlights are the only Senshi other than Sailor Moon who successfully wound Galaxia via a combined attack, as in the anime.
The sixth musical, Shin Densetsu Kourin, features Galaxia but not the Starlights, the task of protecting Sailor Moon after the deaths of the Sailor Senshi is instead taken by the Amazon Trio.
Read more about this topic: Sailor Starlights