
Quick answer — Yukiko Aruga voices Shikyuutai in Cells at Work! CODE BLACK, Ritsuko Amano in A Couple of Cuckoos.
Yukiko Aruga voices Shikyuutai (Cells at Work! CODE BLACK), Ritsuko Amano (A Couple of Cuckoos).
Shikyuutai is voiced in Japanese by Yukiko Aruga.