Piret Järvis (born 6 February 1984 in Tallinn) is an Estonian singer, guitarist and songwriter of the popular girl group Vanilla Ninja. Currently she is working as a presenter and an editor for the Estonian Public Broadcasting.

Born to Maire and Enno Järvis she has an older sister and a younger brother. After graduating high-school she won a scholarship to continue her studies at the International University of Concordia where she was majoring in Media and Public Relations. Currently she is studying journalism and communications at the University of Tartu.

She joined Vanilla Ninja in 2002 and is one of three members to have stayed a member since its formation. Piret has written lyrics for the song "Club Kung Fu", that made Vanilla Ninja well known in Estonia. She has continued as a lyricist for many of the band's songs like "Birds Of Peace", "I Don't Care At All", "Black Symphony" etc. Although she initially played a more 'background' role in the group, she featured heavily on their 2005 album Blue Tattoo due to Maarja Kivi (the former lead singer) leaving in 2004. Järvis often acts as the spokesperson for the group in interviews, and on numerous occasions has been dubbed as the best looking and most stylish member. In 2005 she was voted Estonia's sexiest woman of the year by the readers of Estonia's best-selling gossip magazine "Kroonika".

Lenna Kuurmaa (born 26 September 1985 in Tallinn, Estonia) is an Estonian singer-songwriter and actress. She is a member of the girl group Vanilla Ninja, but after the band's hiatus since 2009, has started work as a solo-artist. She released her debut album Lenna in June 2010.

From 1990 to 2002, Lenna Kuurmaa was a member of the ETV Lasteekraani Muusikastuudio and performed together with the choir in many festivals internationally (in Italy, the Netherlands, Finland, Denmark, Norway, Israel, the United Kingdom, Spain, USA and Russia). She studied violin in Tallinn Music School from 2000 to 2006 under teacher Urvo Uibokand. She received vocal training from Ester Lepa and Ludmilla Issakova 1997–2002. In 2002 she took part of televised singing contest Fizz Superstar, where she made it to the quarter-finals. In the same year Kuurmaa, together with 3 other girls, formed the rock band Vanilla Ninja. After Vanilla Ninja's hiatus in 2009, Lenna Kuurmaa started working as a solo-musician with the artist-name Lenna. In June 2010, she released her debut album Lenna under Mortimer Snerd. All of the songs were written together with and produced by Vaiko Eplik, who is also the owner of the record label. Her band also performed at the 2010 Shanghai EXPO.

Katrin Siska (born December 10, 1983 in Tallinn, Estonia) is an Estonian musician and member of the Estonian pop-rock band Vanilla Ninja.

Alongside her musical commitments, Siska has also been studying finance and accounting at a vocational school and international relations and diplomacy in Tallinn. After moving back to Estonia with Vanilla Ninja from Germany in year 2006 she went back to the university again - now she is studying law at Tallinn University of Technology.^{[citation needed]}

She is fluent in Estonian, Russian, English, German and Finnish.^{[citation needed]} At the university she has been studying also French.

Siska was a member of a choir during her schooltime and started playing the piano when she was 7 years old. She has a younger sister.^{[citation needed]}

In August 2009, Siska joined the Estonian Centre Party.