Sailor Star Healer Cast List
Sailor Star Healer and the other Starlights appear late in the series and briefly. Even in the musicals, the characters only were introduced when the first stage was almost wrapping up and only lasted through the second stage (the official 'Second Stage' is through both Fumina Hara and Kanabe Miyuki's terms playing Sailor Moon). This could have been a good thing as the Starlight's characters were not really explored much in the anime or manga, which gives the actresses who played them less source material to draw from. Only two actresses played Yaten and Star Healer, and they were:

Okuyama Momoko
Okuyama Momoko Out of Costume and as Sailor Star Healer Profile:
First Name: Momoko
Last Name: Okuyama
Birthdate: January 19, 1974
Blood Type: AB
Good With: Singing, Acting, Dancing
# of Myu Performances: 113

More Information:
Okuyama Momoko's Official Website [Japanese];

Momoko was the longest-running Sailor Star Healer, playing her from 1996-1998. Her Yaten was a bit more light-hearted than Yaten usually is.

Musicals in:

Sailor Stars
Sailor Stars [Kaiteiban]
Eien Densetsu
Eien Densetsu Final Act [kaiteiban], Final First Stage

Tabe Mikako Out of Costume and as Sailor Star Healer Profile:
First Name: Mikako
Last Name: Tabe
Nicknames: Mika-chan, Mikarin, Tabecchi, Tabe-chan Birthdate: January 25, 1989
Birthplace: Tokyo, Japan
Height: 5'1" [157cm]
Blood Type: O
Good With: Jazz Dance, Swimming, Skating, Basketball
# of Myu Performances: 61

More Information:
Tabe Mikako's Official Website [Japanese]

Musical in:
Starlights*Ryuusei Densetsu
Kakyuu-ouhi Kourin