Characters from top left
Hatoko Kushikawa, Over Element (五帝, Five Emperors) - water magic
Jurai Andou, Dark and Dark (黒焰, Black Flame) - Literally Dark Flame Master
Sayumi Takanashi, Root Of Origin (始原, Origin) - healing magic
Chifuyu Himeki, World Create (創世, World Creation) - some gothic stuff
Not pictured her redhead main girl
Tomoyo Kanzaki, Closed Clock (永遠, Eternity) - stopping time