The group was initially named "FLOWER" (with upcase letters) until the release of "Taiyou to Himawari" in 2013, when they changed their name to "Flower".
Their groupmate, Happiness, was also not signed to rhythm zone until 2014.
Flower was the only unit to have only one vocalist on its line-up: Washio Reina. Muto Chiharu and Ichiki Kyoka left the group in November 2014 and October 2015, respectively.
They were also the only unit to not add new members since their debut.
Mizuno Erina was originally the group's leader until her departure from the group in October 2013. Shigetome Manami was chosen as the leader afterwards, remaining until the group's disbandment.
Ichiki Kyoka, although being added to the group as a vocalist and performer, was initially more pushed being a performer than a vocalist. She started being more active as a vocalist in 2013 starting with the song "Taiyou to Himawari", her first a-side single as a vocalist. Prior to that, she only participated vocally on the song "Fadeless Love", b-side from their debut single "Still". With Chiharu leaving the group in November 2014, Kyoka got a big part of her lines and was pushed as the second vocalist until her departure of the group in October 2015.
Flower won the Musha Shugyo competition by 3 points against 2 of Happiness. As a 'prize', their song "Hatsukoi" was included as b-side of E-girls' single "Gomennasai no Kissing You".
Many of the group's songs are based on fairy tales, and their performance focused on fantastic and emotional delivery with contemporary dance and ballet.[1]