Here is the full list of all 32 Elemental Girls achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Selina Easy
Serafina Easy
Zinovy Easy
Lesma Easy
Pelagia Easy
Korentine Easy
Hera Easy
Gaia Easy
Genevieve Hight
Selina Normal
Serafina Normal
Zinovy Normal
Lesma Normal
Pelagia Normal
Korentine Normal
Hera Normal
Gaia Normal
Agnia Normal
Genevieve Normal
Lesma Hight
Serafina Hight
Selina Hight
Zinovy Hight
Pelagia Hight
Hera Hight
GameOut
Korentine Hight
Gaia Hight
Agnia Hight
Agnia Easy
Genevieve Easy
GameOn