
Quick answer — Rena Hasegawa voices Atre in Dropkick on My Devil!!! X, Haru Kagurano in Science Fell in Love, So I Tried to Prove It r=1-sinθ, Rio Amakusa in Koikimo and 3 more characters.
Rena Hasegawa voices Atre (Dropkick on My Devil!!! X), Haru Kagurano (Science Fell in Love, So I Tried to Prove It r=1-sinθ), Rio Amakusa (Koikimo), Pollux Gemini (The Classroom of the Black Cat and a Witch), Karina Kakogawa (Farewell, My Dear Cramer), Kuroeda (Plus-Sized Elf).
Atre is voiced in Japanese by Rena Hasegawa.