I haven't seen a board or thread yet about them here so I decided to create one.

Nene = super fun and lovely.....with bouncing boobs ; her English has a slight accent (?) but her Japanese super fluent
Hana = leader of the group ; knows Japanese, English and some French
Isla Coleman = strong singing voice ; not a fan of her design but still good ; I wonder if she is South East Asian (?)
Charlotte Suzu = American?
Reina = pink-haired girl ; her Youtube location says USA.