Introduced in the final arc of Sailor Moon , they are none other than the Sailor Starlights. By day, they're the pop group Three Lights but by night, they're the Starlights.
Some sad news for Sailor Moon fans as Emi Shinohara, who voiced Makoto Kino / Sailor Jupiter in the original 1992 anime, has passed away at age 61. She's the second voice actress who voiced a Sailor Guardian in the series to have passed on as Shiho Niiyama, who voiced Seiya Kou / Sailor Star Fighter, passed away from leukaemia in February 7, 2000 at age 29, over a month shy of her 30th birthday. She'll sadly be missed.
This Sailor Moon villainess had an unusual death by the anime's standard. She crashed her van into a river after Mimete sabotaged the brakes with acid snails.
Hotaru Tomoe is the only Sailor Guardian who didn't get her name changed in the original English dub of the Nineties anime adaptation in contrast to the other nine Guardians, though she went by Jenny in some English translated versions of the manga as in Tokyopop/Mixx.