PLATINUM♦COIN's highest selling single is "Doku Ringo wo Tabesasete / Ashita no Tame ni Kiss wo / Ai" with 45,345 copies sold, while their lowest selling major label single is "Kiseki wo Kura / Horizon" with only 30,102 copies sold.
Their official group color is Maroon.
- Inoue Nozomi (井上希美; Purple) Leader
- Ouchi Hoshiko (大内星子; Orange) Sub-Leader
- Fukuda Konoe (福田近衛; Blue)
- Yamakawa Tamaki (山川玉木; Red)
- Tokugawa Nanami (徳川七海; Yellow)
- Saito Ryouko (斎藤遼子; Green)
- Takahashi Cara (高橋カラ; Pink)
On January 2, the formation of PLATINUM♦COIN (along with Sakura Station and YU+YU) was announced. The members were revealed to be Hello Pro Idol members Inoue Nozomi, Ouchi Hoshiko, Fukuda Konoe, Yamakawa Tamaki, Tokugawa Nanami, Saito Ryouko, and Takahashi Cara. The group would be a part of the Hello! Pro Girls Indies District until their major debut.
On January 12, their debut indies single, BREAKOUT, BREAKDOWN was announced for release on March 3.
On August 1, it was announced that PLATINUM♦COIN would be promoted to the main division. It was also confirmed more news about the group's activities would be revealed in the next month. All of the members graduated from the Girls Division Kenshuusei.
On September 23, PLATINUM♦COIN's major debut was announced. The group would release their major debut single in January 2017, after releasing a final indies single.
On January 5, the group made their major debut with the single "Doku Ringo wo Tabesasete / Ashita no Tame ni Kiss wo / Ai".
- [2016.03.03] BREAKOUT, BREAKDOWN
- [2016.06.01] Make It PLATINUM!!!
- [2016.09.15] Koibito Striker
- [2016.11.29] 21ji Made no Cinderella - Berryz Koubou cover
- [2017.01.05] Doku Ringo wo Tabesasete / Ashita no Tame ni Kiss wo / Ai (毒リンゴを食べさせて / 明日のためにキスを / あい; Let Me Eat The Poisoned Apple / A Kiss for Tomorrow / Love)
- [2017.05.28] Kiseki wo Kure / Horizon (奇跡をくれ / ホリゾン; Gimme a Miracle / Horizon)
- [2017.10.11] Aoi Tsuki ga Miteru Kara / Inochi no Tsukaimichi / Kataomoi no Taikakusen (青い月がみてるから / 命の使い道 / 片思いの対角線; Because the Blue Moon is Watching / Usage of Life / Sideline Love)