Some of you already know that Gabriel has V Flower's voice, and Leo has Oliver's, so here's Crimson and Tsuki's

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Crimson: Fukase

(Japanese)

https://www.youtube.com/watch?v=bUczWV8k0EY

Song: Cantarella

(English)

https://www.youtube.com/watch?v=hVPff92tkBE

Song: Colorbars

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Tsuki: Utatane Piko

(Japanese)

https://www.youtube.com/watch?v=SJGpHnYFX_0

Song: Creative Remix

I couldn't find and English song lol

I think Sharron can also fit Piko's voice lol